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实用功能和经典的javaScript代码

2005-12-14 22:53 639 查看

一、验证类
1、数字验证内
1.1 整数
/^(-|/+)?/d+$/.test(str)
1.2 大于0的整数（用于传来的ID的验证)
/^/d+$/.test(str)
1.3 负整数的验证
/^-/d+$/.test(str)
2、时间类
2.1 短时间，形如 (13:04:06)
function isTime(str)
{
var a = str.match(/^(/d{1,2})(:)?(/d{1,2})/2(/d{1,2})$/);
if (a == null) {alert('输入的参数不是时间格式'); return false;}
if (a[1]>24 || a[3]>60 || a[4]>60)
{
alert("时间格式不对");
return false
}
return true;
}
2.2 短日期，形如 (2003-12-05)
function strDateTime(str)
{
var r = str.match(/^(/d{1,4})(-|//)(/d{1,2})/2(/d{1,2})$/);
if(r==null)return false;
var d= new Date(r[1], r[3]-1, r[4]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}
2.3 长时间，形如 (2003-12-05 13:04:06)
function strDateTime(str)
{
var reg = /^(/d{1,4})(-|//)(/d{1,2})/2(/d{1,2}) (/d{1,2}):(/d{1,2}):(/d{1,2})$/;
var r = str.match(reg);
if(r==null)return false;
var d= new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]&&d.getHours()==r[5]&&d.getMinutes()==r[6]&&d.getSeconds()==r[7]);
}
2.4 只有年和月。形如(2003-05,或者2003-5)
2.5 只有小时和分钟,形如(12:03)
3、表单类
3.1 所有的表单的值都不能为空
<input onblur="if(this.value.replace(/^/s+|/s+$/g,'')=='')alert('不能为空!')">
3.2 多行文本框的值不能为空。
3.3 多行文本框的值不能超过sMaxStrleng
3.4 多行文本框的值不能少于sMixStrleng
3.5 判断单选框是否选择。
3.6 判断复选框是否选择.
3.7 复选框的全选，多选，全不选，反选
3.8 文件上传过程中判断文件类型
4、字符类
4.1 判断字符全部由a-Z或者是A-Z的字字母组成
<input onblur="if(/[^a-zA-Z]/g.test(this.value))alert('有错')">
4.2 判断字符由字母和数字组成。
<input onblur="if(/[^0-9a-zA-Z]/g.test(this.value))alert('有错')">
4.3 判断字符由字母和数字，下划线,点号组成.且开头的只能是下划线和字母
/^([a-zA-z_]{1})([/w]*)$/g.test(str)
4.4 字符串替换函数.Replace();
5、浏览器类
5.1 判断浏览器的类型
window.navigator.appName
5.2 判断ie的版本
window.navigator.appVersion
5.3 判断客户端的分辨率
window.screen.height; window.screen.width;

6、结合类
6.1 email的判断。
function ismail(mail)
{
return(new RegExp(/^/w+((-/w+)|(/./w+))*/@[A-Za-z0-9]+((/.|-)[A-Za-z0-9]+)*/.[A-Za-z0-9]+$/).test(mail));
}
6.2 手机号码的验证
6.3 身份证的验证
function isIdCardNo(num)
{
if (isNaN(num)) {alert("输入的不是数字！"); return false;}
var len = num.length, re;
if (len == 15)
re = new RegExp(/^(/d{6})()?(/d{2})(/d{2})(/d{2})(/d{3})$/);
else if (len == 18)
re = new RegExp(/^(/d{6})()?(/d{4})(/d{2})(/d{2})(/d{3})(/d)$/);
else {alert("输入的数字位数不对！"); return false;}
var a = num.match(re);
if (a != null)
{
if (len==15)
{
var D = new Date("19"+a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
else
{
var D = new Date(a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getFullYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
if (!B) {alert("输入的身份证号 "+ a[0] +" 里出生日期不对！"); return false;}
}
return true;
}

画图:
<OBJECT
id=S
style="LEFT: 0px; WIDTH: 392px; TOP: 0px; HEIGHT: 240px"
height=240
width=392
classid="clsid:369303C2-D7AC-11D0-89D5-00A0C90833E6">
</OBJECT>
<SCRIPT>
S.DrawingSurface.ArcDegrees(0,0,0,30,50,60);
S.DrawingSurface.ArcRadians(30,0,0,30,50,60);
S.DrawingSurface.Line(10,10,100,100);
</SCRIPT>

写注册表：
<SCRIPT>
var WshShell = WScript.CreateObject("WScript.Shell");
WshShell.RegWrite ("HKCU//Software//ACME//FortuneTeller//", 1, "REG_BINARY");
WshShell.RegWrite ("HKCU//Software//ACME//FortuneTeller//MindReader", "Goocher!", "REG_SZ");
var bKey = WshShell.RegRead ("HKCU//Software//ACME//FortuneTeller//");
WScript.Echo (WshShell.RegRead ("HKCU//Software//ACME//FortuneTeller//MindReader"));
WshShell.RegDelete ("HKCU//Software//ACME//FortuneTeller//MindReader");
WshShell.RegDelete ("HKCU//Software//ACME//FortuneTeller//");
WshShell.RegDelete ("HKCU//Software//ACME//");
</SCRIPT>

TABLAE相关(客户端动态增加行列）
<HTML>
<SCRIPT LANGUAGE="JScript">
function numberCells() {
var count=0;
for (i=0; i < document.all.mytable.rows.length; i++) {
for (j=0; j < document.all.mytable.rows(i).cells.length; j++) {
document.all.mytable.rows(i).cells(j).innerText = count;
count++;
}
}
}
</SCRIPT>
<BODY onload="numberCells()">
<TABLE id=mytable border=1>
<TR><TH> </TH><TH> </TH><TH> </TH><TH> </TH></TR>
<TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR>
<TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR>
</TABLE>
</BODY>
</HTML>

１．身份证严格验证：

<script>
var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"}

function cidInfo(sId){
var iSum=0
var info=""
if(!/^/d{17}(/d|x)$/i.test(sId))return false;
sId=sId.replace(/x$/i,"a");
if(aCity[parseInt(sId.substr(0,2))]==null)return "Error:非法地区";
sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2));
var d=new Date(sBirthday.replace(/-/g,"/"))
if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))return "Error:非法生日";
for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11)
if(iSum%11!=1)return "Error:非法证号";
return aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女")
}

document.write(cidInfo("380524198002300016"),"<br/>");
document.write(cidInfo("340524198002300019"),"<br/>")
document.write(cidInfo("340524197711111111"),"<br/>")
document.write(cidInfo("34052419800101001x"),"<br/>");
</script>

２．验证ＩＰ地址
<SCRIPT LANGUAGE="JavaScript">
function isip(s){
var check=function(v){try{return (v<=255 && v>=0)}catch(x){return false}};
var re=s.split(".")
return (re.length==4)?(check(re[0]) && check(re[1]) && check(re[2]) && check(re[3])):false
}

var s="202.197.78.129";
alert(isip(s))
</SCRIPT>

３．加sp1后还能用的无边框窗口！！
<HTML XMLNS:IE>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<IE:Download ID="include" STYLE="behavior:url(#default#download)" />
<title>Chromeless Window</title>

<SCRIPT LANGUAGE="JScript">
/*--- Special Thanks For andot ---*/

/*
This following code are designed and writen by Windy_sk <seasonx@163.net>
You can use it freely, but u must held all the copyright items!
*/

/*--- Thanks For andot Again ---*/

var CW_width = 400;
var CW_height = 300;
var CW_top = 100;
var CW_left = 100;
var CW_url = "/";
var New_CW = window.createPopup();
var CW_Body = New_CW.document.body;
var content = "";
var CSStext = "margin:1px;color:black; border:2px outset;border-style:expression(onmouseout=onmouseup=function(){this.style.borderStyle='outset'}, onmousedown=function(){if(event.button!=2)this.style.borderStyle='inset'});background-color:buttonface;width:16px;height:14px;font-size:12px;line-height:11px;cursor:Default;";

//Build Window
include.startDownload(CW_url, function(source){content=source});

function insert_content(){
var temp = "";
CW_Body.style.overflow = "hidden";
CW_Body.style.backgroundColor = "white";
CW_Body.style.border = "solid black 1px";
content = content.replace(/<a ([^>]*)>/g,"<a onclick='parent.open(this.href);return false' $1>");
temp += "<table width=100% height=100% cellpadding=0 cellspacing=0 border=0>";
temp += "<tr style=';font-size:12px;background:#0099CC;height:20;cursor:default' ondblclick=/"Max.innerText=Max.innerText=='1'?'2':'1';parent.if_max=!parent.if_max;parent.show_CW();/" onmouseup='parent.drag_up(event)' onmousemove='parent.drag_move(event)' onmousedown='parent.drag_down(event)' onselectstart='return false' oncontextmenu='return false'>";
temp += "<td style='color:#ffffff;padding-left:5px'>Chromeless Window For IE6 SP1</td>";
temp += "<td style='color:#ffffff;padding-right:5px;' align=right>";
temp += "<span id=Help onclick=/"alert('Chromeless Window For IE6 SP1 - Ver 1.0//n//nCode By Windy_sk//n//nSpecial Thanks For andot')/" style=/""+CSStext+"font-family:System;padding-right:2px;/">?</span>";
temp += "<span id=Min onclick='parent.New_CW.hide();parent.blur()' style=/""+CSStext+"font-family:Webdings;/" title='Minimum'>0</span>";
temp += "<span id=Max onclick=/"this.innerText=this.innerText=='1'?'2':'1';parent.if_max=!parent.if_max;parent.show_CW();/" style=/""+CSStext+"font-family:Webdings;/" title='Maximum'>1</span>";
temp += "<span id=Close onclick='parent.opener=null;parent.close()' style=/""+CSStext+"font-family:System;padding-right:2px;/" title='Close'>x</span>";
temp += "</td></tr><tr><td colspan=2>";
temp += "<div id=include style='overflow:scroll;overflow-x:hidden;overflow-y:auto; HEIGHT: 100%; width:"+CW_width+"'>";
temp += content;
temp += "</div>";
temp += "</td></tr></table>";
CW_Body.innerHTML = temp;
}

setTimeout("insert_content()",1000);

var if_max = true;
function show_CW(){
window.moveTo(10000, 10000);
if(if_max){
New_CW.show(CW_top, CW_left, CW_width, CW_height);
if(typeof(New_CW.document.all.include)!="undefined"){
New_CW.document.all.include.style.width = CW_width;
New_CW.document.all.Max.innerText = "1";
}

}else{
New_CW.show(0, 0, screen.width, screen.height);
New_CW.document.all.include.style.width = screen.width;
}
}

window.onfocus = show_CW;
window.onresize = show_CW;

// Move Window
var drag_x,drag_y,draging=false

function drag_move(e){
if (draging){
New_CW.show(e.screenX-drag_x, e.screenY-drag_y, CW_width, CW_height);
return false;
}
}

function drag_down(e){
if(e.button==2)return;
if(New_CW.document.body.offsetWidth==screen.width && New_CW.document.body.offsetHeight==screen.height)return;
drag_x=e.clientX;
drag_y=e.clientY;
draging=true;
e.srcElement.setCapture();
}

function drag_up(e){
draging=false;
e.srcElement.releaseCapture();
if(New_CW.document.body.offsetWidth==screen.width && New_CW.document.body.offsetHeight==screen.height) return;
CW_top = e.screenX-drag_x;
CW_left = e.screenY-drag_y;
}

</SCRIPT>
</HTML>

贴两个关于treeview的
<script language="javascript">

</script>

treeview中如何在服务器端得到客户端设置后的节点选中状态
<script language="C#" runat="server">
private void Button1_Click(object sender, System.EventArgs e)
{
Response.Write(TreeView1.Nodes[0].Checked);
}
</script>
<script language="javascript">
function set_check()
{
var nodeindex = "0";
var node=TreeView1.getTreeNode(nodeindex);
node.setAttribute("Checked","True");
TreeView1.queueEvent('oncheck', nodeindex);
}
</script>

http://www.baron.com.cn/javascript/time/20021106time1.htm
非常实用的日期选择代码

三個實用的小技巧:關閉輸入法.禁止貼上.禁止複製
關閉輸入法

本文字框輸入法被關閉：
語法： style="ime-mode:disabled"
範例： <input type="text" name="textfield" style="ime-mode:disabled">

禁止貼上

本文字框禁止貼上文字：
語法：onpaste="return false"
範例：<input type="text" name="textfield" onpaste="return false">

禁止複製

本文字框禁止複製：
語法：oncopy="return false;" oncut="return false;"
範例：<input name="textfield" type="text" value="不能複製裡面的字" oncopy="return false;" oncut="return false;">

http://www.imgshow.com/blog/showlog.asp?log_id=634&cat_id=35
页面嵌入式流媒体点唱机

http://www.ddvip.net/web/javascript/jq/55.htm

一个很酷的程序JavaScript做的MID歌曲搜索播放器[IE](JS)
比较简单!

http://fason.nease.net
http://blog.csdn.net/rickjelly2004/category/19937.aspx
http://blog.csdn.net/rickjelly2004/category/19922.aspx

//================================
//Cookie操作
//================================
function getCookieVal (offset)
{
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name)
{
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen)
{
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0)
break;
}
return null;
}

function deleteCookie(cname) {

var expdate = new Date();
expdate.setTime(expdate.getTime() - (24 * 60 * 60 * 1000 * 369));

// document.cookie =" ckValue="ok"; expires="+ expdate.toGMTString();
setCookie(cname,"",expdate);

}

function setCookie (name, value, expires) {

document.cookie = name + "=" + escape(value) +
"; expires=" + expires.toGMTString() ;
}

[点击此处收藏本文]
发表于 2004年10月28日 9:27 AM

goody9807 发表于2004-10-28 9:40 AM
一个可以在页面上随意画线、多边形、圆，填充等功能的js （part 1）

var jg_ihtm, jg_ie, jg_fast, jg_dom, jg_moz,
jg_n4 = (document.layers && typeof document.classes != "undefined");

function chkDHTM(x, i)
{
x = document.body || null;
jg_ie = x && typeof x.insertAdjacentHTML != "undefined";
jg_dom = (x && !jg_ie &&
typeof x.appendChild != "undefined" &&
typeof document.createRange != "undefined" &&
typeof (i = document.createRange()).setStartBefore != "undefined" &&
typeof i.createContextualFragment != "undefined");
jg_ihtm = !jg_ie && !jg_dom && x && typeof x.innerHTML != "undefined";
jg_fast = jg_ie && document.all && !window.opera;
jg_moz = jg_dom && typeof x.style.MozOpacity != "undefined";
}

function pntDoc()
{
this.wnd.document.write(jg_fast? this.htmRpc() : this.htm);
this.htm = '';
}

function pntCnvDom()
{
var x = document.createRange();
x.setStartBefore(this.cnv);
x = x.createContextualFragment(jg_fast? this.htmRpc() : this.htm);
this.cnv.appendChild(x);
this.htm = '';
}

function pntCnvIe()
{
this.cnv.insertAdjacentHTML("BeforeEnd", jg_fast? this.htmRpc() : this.htm);
this.htm = '';
}

function pntCnvIhtm()
{
this.cnv.innerHTML += this.htm;
this.htm = '';
}

function pntCnv()
{
this.htm = '';
}

function mkDiv(x, y, w, h)
{
this.htm += '<div style="position:absolute;'+
'left:' + x + 'px;'+
'top:' + y + 'px;'+
'width:' + w + 'px;'+
'height:' + h + 'px;'+
'clip:rect(0,'+w+'px,'+h+'px,0);'+
'background-color:' + this.color +
(!jg_moz? ';overflow:hidden' : '')+
';"><//div>';
}

function mkDivIe(x, y, w, h)
{
this.htm += '%%'+this.color+';'+x+';'+y+';'+w+';'+h+';';
}

function mkDivPrt(x, y, w, h)
{
this.htm += '<div style="position:absolute;'+
'border-left:' + w + 'px solid ' + this.color + ';'+
'left:' + x + 'px;'+
'top:' + y + 'px;'+
'width:0px;'+
'height:' + h + 'px;'+
'clip:rect(0,'+w+'px,'+h+'px,0);'+
'background-color:' + this.color +
(!jg_moz? ';overflow:hidden' : '')+
';"><//div>';
}

function mkLyr(x, y, w, h)
{
this.htm += '<layer '+
'left="' + x + '" '+
'top="' + y + '" '+
'width="' + w + '" '+
'height="' + h + '" '+
'bgcolor="' + this.color + '"><//layer>/n';
}

var regex = /%%([^;]+);([^;]+);([^;]+);([^;]+);([^;]+);/g;
function htmRpc()
{
return this.htm.replace(
regex,
'<div style="overflow:hidden;position:absolute;background-color:'+
'$1;left:$2;top:$3;width:$4;height:$5"></div>/n');
}

function htmPrtRpc()
{
return this.htm.replace(
regex,
'<div style="overflow:hidden;position:absolute;background-color:'+
'$1;left:$2;top:$3;width:$4;height:$5;border-left:$4px solid $1"></div>/n');
}

function mkLin(x1, y1, x2, y2)
{
if (x1 > x2)
{
var _x2 = x2;
var _y2 = y2;
x2 = x1;
y2 = y1;
x1 = _x2;
y1 = _y2;
}
var dx = x2-x1, dy = Math.abs(y2-y1),
x = x1, y = y1,
yIncr = (y1 > y2)? -1 : 1;

if (dx >= dy)
{
var pr = dy<<1,
pru = pr - (dx<<1),
p = pr-dx,
ox = x;
while ((dx--) > 0)
{
++x;
if (p > 0)
{
this.mkDiv(ox, y, x-ox, 1);
y += yIncr;
p += pru;
ox = x;
}
else p += pr;
}
this.mkDiv(ox, y, x2-ox+1, 1);
}

else
{
var pr = dx<<1,
pru = pr - (dy<<1),
p = pr-dy,
oy = y;
if (y2 <= y1)
{
while ((dy--) > 0)
{
if (p > 0)
{
this.mkDiv(x++, y, 1, oy-y+1);
y += yIncr;
p += pru;
oy = y;
}
else
{
y += yIncr;
p += pr;
}
}
this.mkDiv(x2, y2, 1, oy-y2+1);
}
else
{
while ((dy--) > 0)
{
y += yIncr;
if (p > 0)
{
this.mkDiv(x++, oy, 1, y-oy);
p += pru;
oy = y;
}
else p += pr;
}
this.mkDiv(x2, oy, 1, y2-oy+1);
}
}
}

function mkLin2D(x1, y1, x2, y2)
{
if (x1 > x2)
{
var _x2 = x2;
var _y2 = y2;
x2 = x1;
y2 = y1;
x1 = _x2;
y1 = _y2;
}
var dx = x2-x1, dy = Math.abs(y2-y1),
x = x1, y = y1,
yIncr = (y1 > y2)? -1 : 1;

var s = this.stroke;
if (dx >= dy)
{
if (s-3 > 0)
{
var _s = (s*dx*Math.sqrt(1+dy*dy/(dx*dx))-dx-(s>>1)*dy) / dx;
_s = (!(s-4)? Math.ceil(_s) : Math.round(_s)) + 1;
}
else var _s = s;
var ad = Math.ceil(s/2);

var pr = dy<<1,
pru = pr - (dx<<1),
p = pr-dx,
ox = x;
while ((dx--) > 0)
{
++x;
if (p > 0)
{
this.mkDiv(ox, y, x-ox+ad, _s);
y += yIncr;
p += pru;
ox = x;
}
else p += pr;
}
this.mkDiv(ox, y, x2-ox+ad+1, _s);
}

else
{
if (s-3 > 0)
{
var _s = (s*dy*Math.sqrt(1+dx*dx/(dy*dy))-(s>>1)*dx-dy) / dy;
_s = (!(s-4)? Math.ceil(_s) : Math.round(_s)) + 1;
}
else var _s = s;
var ad = Math.round(s/2);

var pr = dx<<1,
pru = pr - (dy<<1),
p = pr-dy,
oy = y;
if (y2 <= y1)
{
++ad;
while ((dy--) > 0)
{
if (p > 0)
{
this.mkDiv(x++, y, _s, oy-y+ad);
y += yIncr;
p += pru;
oy = y;
}
else
{
y += yIncr;
p += pr;
}
}
this.mkDiv(x2, y2, _s, oy-y2+ad);
}
else
{
while ((dy--) > 0)
{
y += yIncr;
if (p > 0)
{
this.mkDiv(x++, oy, _s, y-oy+ad);
p += pru;
oy = y;
}
else p += pr;
}
this.mkDiv(x2, oy, _s, y2-oy+ad+1);
}
}
}

function mkLinDott(x1, y1, x2, y2)
{
if (x1 > x2)
{
var _x2 = x2;
var _y2 = y2;
x2 = x1;
y2 = y1;
x1 = _x2;
y1 = _y2;
}
var dx = x2-x1, dy = Math.abs(y2-y1),
x = x1, y = y1,
yIncr = (y1 > y2)? -1 : 1,
drw = true;
if (dx >= dy)
{
var pr = dy<<1,
pru = pr - (dx<<1),
p = pr-dx;
while ((dx--) > 0)
{
if (drw) this.mkDiv(x, y, 1, 1);
drw = !drw;
if (p > 0)
{
y += yIncr;
p += pru;
}
else p += pr;
++x;
}
if (drw) this.mkDiv(x, y, 1, 1);
}

else
{
var pr = dx<<1,
pru = pr - (dy<<1),
p = pr-dy;
while ((dy--) > 0)
{
if (drw) this.mkDiv(x, y, 1, 1);
drw = !drw;
y += yIncr;
if (p > 0)
{
++x;
p += pru;
}
else p += pr;
}
if (drw) this.mkDiv(x, y, 1, 1);
}
}

function mkOv(left, top, width, height)
{
var a = width>>1, b = height>>1,
wod = width&1, hod = (height&1)+1,
cx = left+a, cy = top+b,
x = 0, y = b,
ox = 0, oy = b,
aa = (a*a)<<1, bb = (b*b)<<1,
st = (aa>>1)*(1-(b<<1)) + bb,
tt = (bb>>1) - aa*((b<<1)-1),
w, h;
while (y > 0)
{
if (st < 0)
{
st += bb*((x<<1)+3);
tt += (bb<<1)*(++x);
}
else if (tt < 0)
{
st += bb*((x<<1)+3) - (aa<<1)*(y-1);
tt += (bb<<1)*(++x) - aa*(((y--)<<1)-3);
w = x-ox;
h = oy-y;
if (w&2 && h&2)
{
this.mkOvQds(cx, cy, -x+2, ox+wod, -oy, oy-1+hod, 1, 1);
this.mkOvQds(cx, cy, -x+1, x-1+wod, -y-1, y+hod, 1, 1);
}
else this.mkOvQds(cx, cy, -x+1, ox+wod, -oy, oy-h+hod, w, h);
ox = x;
oy = y;
}
else
{
tt -= aa*((y<<1)-3);
st -= (aa<<1)*(--y);
}
}
this.mkDiv(cx-a, cy-oy, a-ox+1, (oy<<1)+hod);
this.mkDiv(cx+ox+wod, cy-oy, a-ox+1, (oy<<1)+hod);
}

一个可以在页面上随意画线、多边形、圆，填充等功能的js （part 2）

function mkOv2D(left, top, width, height)
{
var s = this.stroke;
width += s-1;
height += s-1;
var a = width>>1, b = height>>1,
wod = width&1, hod = (height&1)+1,
cx = left+a, cy = top+b,
x = 0, y = b,
aa = (a*a)<<1, bb = (b*b)<<1,
st = (aa>>1)*(1-(b<<1)) + bb,
tt = (bb>>1) - aa*((b<<1)-1);

if (s-4 < 0 && (!(s-2) || width-51 > 0 && height-51 > 0))
{
var ox = 0, oy = b,
w, h,
pxl, pxr, pxt, pxb, pxw;
while (y > 0)
{
if (st < 0)
{
st += bb*((x<<1)+3);
tt += (bb<<1)*(++x);
}
else if (tt < 0)
{
st += bb*((x<<1)+3) - (aa<<1)*(y-1);
tt += (bb<<1)*(++x) - aa*(((y--)<<1)-3);
w = x-ox;
h = oy-y;

if (w-1)
{
pxw = w+1+(s&1);
h = s;
}
else if (h-1)
{
pxw = s;
h += 1+(s&1);
}
else pxw = h = s;
this.mkOvQds(cx, cy, -x+1, ox-pxw+w+wod, -oy, -h+oy+hod, pxw, h);
ox = x;
oy = y;
}
else
{
tt -= aa*((y<<1)-3);
st -= (aa<<1)*(--y);
}
}
this.mkDiv(cx-a, cy-oy, s, (oy<<1)+hod);
this.mkDiv(cx+a+wod-s+1, cy-oy, s, (oy<<1)+hod);
}

else
{
var _a = (width-((s-1)<<1))>>1,
_b = (height-((s-1)<<1))>>1,
_x = 0, _y = _b,
_aa = (_a*_a)<<1, _bb = (_b*_b)<<1,
_st = (_aa>>1)*(1-(_b<<1)) + _bb,
_tt = (_bb>>1) - _aa*((_b<<1)-1),

pxl = new Array(),
pxt = new Array(),
_pxb = new Array();
pxl[0] = 0;
pxt[0] = b;
_pxb[0] = _b-1;
while (y > 0)
{
if (st < 0)
{
st += bb*((x<<1)+3);
tt += (bb<<1)*(++x);
pxl[pxl.length] = x;
pxt[pxt.length] = y;
}
else if (tt < 0)
{
st += bb*((x<<1)+3) - (aa<<1)*(y-1);
tt += (bb<<1)*(++x) - aa*(((y--)<<1)-3);
pxl[pxl.length] = x;
pxt[pxt.length] = y;
}
else
{
tt -= aa*((y<<1)-3);
st -= (aa<<1)*(--y);
}

if (_y > 0)
{
if (_st < 0)
{
_st += _bb*((_x<<1)+3);
_tt += (_bb<<1)*(++_x);
_pxb[_pxb.length] = _y-1;
}
else if (_tt < 0)
{
_st += _bb*((_x<<1)+3) - (_aa<<1)*(_y-1);
_tt += (_bb<<1)*(++_x) - _aa*(((_y--)<<1)-3);
_pxb[_pxb.length] = _y-1;
}
else
{
_tt -= _aa*((_y<<1)-3);
_st -= (_aa<<1)*(--_y);
_pxb[_pxb.length-1]--;
}
}
}

var ox = 0, oy = b,
_oy = _pxb[0],
l = pxl.length,
w, h;
for (var i = 0; i < l; i++)
{
if (typeof _pxb[i] != "undefined")
{
if (_pxb[i] < _oy || pxt[i] < oy)
{
x = pxl[i];
this.mkOvQds(cx, cy, -x+1, ox+wod, -oy, _oy+hod, x-ox, oy-_oy);
ox = x;
oy = pxt[i];
_oy = _pxb[i];
}
}
else
{
x = pxl[i];
this.mkDiv(cx-x+1, cy-oy, 1, (oy<<1)+hod);
this.mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod);
ox = x;
oy = pxt[i];
}
}
this.mkDiv(cx-a, cy-oy, 1, (oy<<1)+hod);
this.mkDiv(cx+ox+wod, cy-oy, 1, (oy<<1)+hod);
}
}

function mkOvDott(left, top, width, height)
{
var a = width>>1, b = height>>1,
wod = width&1, hod = height&1,
cx = left+a, cy = top+b,
x = 0, y = b,
aa2 = (a*a)<<1, aa4 = aa2<<1, bb = (b*b)<<1,
st = (aa2>>1)*(1-(b<<1)) + bb,
tt = (bb>>1) - aa2*((b<<1)-1),
drw = true;
while (y > 0)
{
if (st < 0)
{
st += bb*((x<<1)+3);
tt += (bb<<1)*(++x);
}
else if (tt < 0)
{
st += bb*((x<<1)+3) - aa4*(y-1);
tt += (bb<<1)*(++x) - aa2*(((y--)<<1)-3);
}
else
{
tt -= aa2*((y<<1)-3);
st -= aa4*(--y);
}
if (drw) this.mkOvQds(cx, cy, -x, x+wod, -y, y+hod, 1, 1);
drw = !drw;
}
}

一个可以在页面上随意画线、多边形、圆，填充等功能的js （part 3）

function mkRect(x, y, w, h)
{
var s = this.stroke;
this.mkDiv(x, y, w, s);
this.mkDiv(x+w, y, s, h);
this.mkDiv(x, y+h, w+s, s);
this.mkDiv(x, y+s, s, h-s);
}

function mkRectDott(x, y, w, h)
{
this.drawLine(x, y, x+w, y);
this.drawLine(x+w, y, x+w, y+h);
this.drawLine(x, y+h, x+w, y+h);
this.drawLine(x, y, x, y+h);
}

function jsgFont()
{
this.PLAIN = 'font-weight:normal;';
this.BOLD = 'font-weight:bold;';
this.ITALIC = 'font-style:italic;';
this.ITALIC_BOLD = this.ITALIC + this.BOLD;
this.BOLD_ITALIC = this.ITALIC_BOLD;
}
var Font = new jsgFont();

function jsgStroke()
{
this.DOTTED = -1;
}
var Stroke = new jsgStroke();

function jsGraphics(id, wnd)
{
this.setColor = new Function('arg', 'this.color = arg.toLowerCase();');

this.setStroke = function(x)
{
this.stroke = x;
if (!(x+1))
{
this.drawLine = mkLinDott;
this.mkOv = mkOvDott;
this.drawRect = mkRectDott;
}
else if (x-1 > 0)
{
this.drawLine = mkLin2D;
this.mkOv = mkOv2D;
this.drawRect = mkRect;
}
else
{
this.drawLine = mkLin;
this.mkOv = mkOv;
this.drawRect = mkRect;
}
};

this.setPrintable = function(arg)
{
this.printable = arg;
if (jg_fast)
{
this.mkDiv = mkDivIe;
this.htmRpc = arg? htmPrtRpc : htmRpc;
}
else this.mkDiv = jg_n4? mkLyr : arg? mkDivPrt : mkDiv;
};

this.setFont = function(fam, sz, sty)
{
this.ftFam = fam;
this.ftSz = sz;
this.ftSty = sty || Font.PLAIN;
};

this.drawPolyline = this.drawPolyLine = function(x, y, s)
{
for (var i=0 ; i<x.length-1 ; i++ )
this.drawLine(x[i], y[i], x[i+1], y[i+1]);
};

this.fillRect = function(x, y, w, h)
{
this.mkDiv(x, y, w, h);
};

this.drawPolygon = function(x, y)
{
this.drawPolyline(x, y);
this.drawLine(x[x.length-1], y[x.length-1], x[0], y[0]);
};

this.drawEllipse = this.drawOval = function(x, y, w, h)
{
this.mkOv(x, y, w, h);
};

this.fillEllipse = this.fillOval = function(left, top, w, h)
{
var a = (w -= 1)>>1, b = (h -= 1)>>1,
wod = (w&1)+1, hod = (h&1)+1,
cx = left+a, cy = top+b,
x = 0, y = b,
ox = 0, oy = b,
aa2 = (a*a)<<1, aa4 = aa2<<1, bb = (b*b)<<1,
st = (aa2>>1)*(1-(b<<1)) + bb,
tt = (bb>>1) - aa2*((b<<1)-1),
pxl, dw, dh;
if (w+1) while (y > 0)
{
if (st < 0)
{
st += bb*((x<<1)+3);
tt += (bb<<1)*(++x);
}
else if (tt < 0)
{
st += bb*((x<<1)+3) - aa4*(y-1);
pxl = cx-x;
dw = (x<<1)+wod;
tt += (bb<<1)*(++x) - aa2*(((y--)<<1)-3);
dh = oy-y;
this.mkDiv(pxl, cy-oy, dw, dh);
this.mkDiv(pxl, cy+oy-dh+hod, dw, dh);
ox = x;
oy = y;
}
else
{
tt -= aa2*((y<<1)-3);
st -= aa4*(--y);
}
}
this.mkDiv(cx-a, cy-oy, w+1, (oy<<1)+hod);
};

this.fillPolygon = function(array_x, array_y)
{
var i;
var y;
var miny, maxy;
var x1, y1;
var x2, y2;
var ind1, ind2;
var ints;

var n = array_x.length;

if (!n) return;

miny = array_y[0];
maxy = array_y[0];
for (i = 1; i < n; i++)
{
if (array_y[i] < miny)
miny = array_y[i];

if (array_y[i] > maxy)
maxy = array_y[i];
}
for (y = miny; y <= maxy; y++)
{
var polyInts = new Array();
ints = 0;
for (i = 0; i < n; i++)
{
if (!i)
{
ind1 = n-1;
ind2 = 0;
}
else
{
ind1 = i-1;
ind2 = i;
}
y1 = array_y[ind1];
y2 = array_y[ind2];
if (y1 < y2)
{
x1 = array_x[ind1];
x2 = array_x[ind2];
}
else if (y1 > y2)
{
y2 = array_y[ind1];
y1 = array_y[ind2];
x2 = array_x[ind1];
x1 = array_x[ind2];
}
else continue;

if ((y >= y1) && (y < y2))
polyInts[ints++] = Math.round((y-y1) * (x2-x1) / (y2-y1) + x1);

else if ((y == maxy) && (y > y1) && (y <= y2))
polyInts[ints++] = Math.round((y-y1) * (x2-x1) / (y2-y1) + x1);
}
polyInts.sort(integer_compare);

for (i = 0; i < ints; i+=2)
{
w = polyInts[i+1]-polyInts[i]
this.mkDiv(polyInts[i], y, polyInts[i+1]-polyInts[i]+1, 1);
}
}
};

this.drawString = function(txt, x, y)
{
this.htm += '<div style="position:absolute;white-space:nowrap;'+
'left:' + x + 'px;'+
'top:' + y + 'px;'+
'font-family:' + this.ftFam + ';'+
'font-size:' + this.ftSz + ';'+
'color:' + this.color + ';' + this.ftSty + '">'+
txt +
'<//div>';
}

this.drawImage = function(imgSrc, x, y, w, h)
{
this.htm += '<div style="position:absolute;'+
'left:' + x + 'px;'+
'top:' + y + 'px;'+
'width:' + w + ';'+
'height:' + h + ';">'+
'<img src="' + imgSrc + '" width="' + w + '" height="' + h + '">'+
'<//div>';
}

this.clear = function()
{
this.htm = "";
if (this.cnv) this.cnv.innerHTML = this.defhtm;
};

this.mkOvQds = function(cx, cy, xl, xr, yt, yb, w, h)
{
this.mkDiv(xr+cx, yt+cy, w, h);
this.mkDiv(xr+cx, yb+cy, w, h);
this.mkDiv(xl+cx, yb+cy, w, h);
this.mkDiv(xl+cx, yt+cy, w, h);
};

this.setStroke(1);
this.setFont('verdana,geneva,helvetica,sans-serif', String.fromCharCode(0x31, 0x32, 0x70, 0x78), Font.PLAIN);
this.color = '#000000';
this.htm = '';
this.wnd = wnd || window;

if (!(jg_ie || jg_dom || jg_ihtm)) chkDHTM();
if (typeof id != 'string' || !id) this.paint = pntDoc;
else
{
this.cnv = document.all? (this.wnd.document.all[id] || null)
: document.getElementById? (this.wnd.document.getElementById(id) || null)
: null;
this.defhtm = (this.cnv && this.cnv.innerHTML)? this.cnv.innerHTML : '';
this.paint = jg_dom? pntCnvDom : jg_ie? pntCnvIe : jg_ihtm? pntCnvIhtm : pntCnv;
}

this.setPrintable(false);
}

function integer_compare(x,y)
{
return (x < y) ? -1 : ((x > y)*1);
}

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