一些实用代码
2008-04-30 22:31
162 查看
1、四舍五入函数：
//number为某实数，n为要保留的小数位数
function myRound(number,n) {
number = Math.round(number*Math.pow(10,n))/Math.pow(10,n);
return number;
}
2、文本框中只能输入数字的函数：
//只能输入数字
//用法 <input name="old" type="text" ONKEYPRESS="event.returnValue=IsDigit();">
function IsDigit()
{
return ((event.keyCode >= 48) && (event.keyCode <= 57));
}
3、去除字符串中的空格的函数：
//去空格函数
//用法 str = cTrim(str,0);
function cTrim(sInputString,iType)
{
var sTmpStr = ' ';
var i = -1;
if(iType == 0 || iType == 1)
{
while(sTmpStr == ' ')
{
++i;
sTmpStr = sInputString.substr(i,1);
}
sInputString = sInputString.substring(i);
}
if(iType == 0 || iType == 2)
{
sTmpStr = ' ';
i = sInputString.length;
while(sTmpStr == ' ')
{
--i;
sTmpStr = sInputString.substr(i,1);
}
sInputString = sInputString.substring(0,i+1);
}
return sInputString;
}
4、在表格上完全屏蔽鼠标右键：
<table oncontextmenu="return(false)">
<tr>
<td>
可在此加入网页元素
</td>
</tr>
</table>
5、取消选取、防止复制：
<body onselectstart="return false">
6、去掉图片链接点击后周围的虚线：
<a href="#" onFocus="this.blur()"><img src="picName.jpg" border=0></a>
7、在子窗口中刷新父窗口：
window.opener.location.reload();
8、设定打开页面的大小：
<body onload="top.resizeTo(300,200);">
<body onload="top.moveBy(300,200);">
9、日期选择器
var months = new Array("一月", "二月", "三月","四月", "五月", "六月", "七月", "八月", "九月","十月", "十一月", "十二月");
var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var days = new Array("星期日","星期一", "星期二", "星期三", "星期四", "星期五", "星期六");
var getObject,oldObject;//取得当前对象
//取得指定年月的天数
function getDays(month, year) {
if (1 == month)
return ((0==year%4)&&(0!=(year%100)))||(0==year%400)?29:28;
else
return daysInMonth[month];
}
//取得今天的年,月,日
function getToday() {
this.now = new Date();
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this.now.getDate();
}
today = new getToday();
//创建日历
function newCalendar() {
today = new getToday();
var parseYear = parseInt(document.all.year[document.all.year.selectedIndex].text);
var newCal = new Date(parseYear,document.all.month.selectedIndex, 1);
var day = -1;
var startDay = newCal.getDay();
var daily = 0;
if ((today.year == newCal.getFullYear()) &&(today.month == newCal.getMonth()))day = today.day;
var tableCal = document.all.calendar.tBodies.dayList;
var intDaysInMonth =getDays(newCal.getMonth(), newCal.getFullYear());
for (var intWeek = 0; intWeek < tableCal.rows.length;intWeek++)
for (var intDay = 0;intDay < tableCal.rows[intWeek].cells.length;intDay++){
var cell = tableCal.rows[intWeek].cells[intDay];
if ((intDay == startDay) && (0 == daily))daily = 1;
if(day==daily)cell.className = "today";//今天的Class
else if(intDay==6)cell.className = "sunday";//周六的Class
else if (intDay==0)cell.className ="satday";//周日的Class
else cell.className="normal";//平常的Class
if ((daily > 0) && (daily <= intDaysInMonth)){
cell.innerText = daily;
daily++;
}else cell.innerText = "";
}
}
//取得鼠标单击处的日期数据
function getDate() {
var sDate;
if ("TD" == event.srcElement.tagName)
if ("" != event.srcElement.innerText){//定义显示日期的格式
sMonth = document.all.month.value;
sDay = event.srcElement.innerText;
if(sMonth.length==1)sMonth = "0"+sMonth;
if(sDay.length==1)sDay = "0"+sDay;
sDate = document.all.year.value + "-" + sMonth + "-" + sDay;
getObject.value=sDate;
window.close();
}
}
//隐藏图层
function HideLayer() {
Layer.style.visibility = "hidden";
}
//显示图层
function LayerShow(){
Layer.style.visibility = "visible";
}
//显示div对象Layer
function ShowLayer(t,l) {
if(oldObject==null)oldObject=getObject;//赋值
if(Layer.style.visibility != "visible" && oldObject==getObject){//判断是否操作同一表
Layer.style.top = t+document.body.scrollTop;
Layer.style.left = l+document.body.scrollLeft;
Layer.style.visibility = "visible";
oldObject=getObject;
}else if(oldObject==getObject){
HideLayer();
}else{
Layer.style.top = t+document.body.scrollTop;
Layer.style.left = l+document.body.scrollLeft;
Layer.style.visibility = "visible";
oldObject=getObject;
}
}
//定义div对象Layer用以显示日期
function getLayer(){
document.write("<div id=/"Layer/" style=/"position:absolute;width:340;z-index:12;boder-color:#ffffff;border:0px outset white;background-color:#D4D0C8;layer-background-color:#D4D0C8;visibility:hidden;height:38;left:58;top:137;/"><input type=/"hidden/" name=/"ret/"><table
width='320' id=/"calendar/" cellpadding=/"0/" align=/"center/"><thead><tr><td height='4'></td></tr><tr><td colspan=7 align=CENTER>请选择月份：<select id=/"month/" onChange=/"newCalendar()/" name=/"select/" class=/"smallSel/">");
for (var intLoop = 0; intLoop < months.length; intLoop++)
document.write("<OPTION VALUE= " + (intLoop + 1) + " " + (today.month == intLoop ? "Selected" : "") + ">" + months[intLoop]);
document.write("</select> 请选择年份：<select id=/"year/" onChange=/"newCalendar()/" name=/"select/" class=/"smallSel/">");
for (var intLoop = today.year-50; intLoop < (today.year + 10); intLoop++)
document.write("<OPTION VALUE= "+intLoop+" "+(today.year == intLoop ? "Selected" : "") + ">" + intLoop);
document.write("</select></td></tr><tr><td height='6'></td></tr><tr class=/"days/">");
document.write("<TD class=sunday>" + days[0] + "</TD>");
for (var intLoop = 1; intLoop < days.length-1;intLoop++)
document.write("<TD>" + days[intLoop] + "</TD>");
document.write("<TD class=sunday>" + days[intLoop] + "</TD>");
document.write(" </tr></thead><tbody border=1 cellspacing=/"0/" cellpadding=/"0/" id=/"dayList/" align=CENTER ONCLICK='getDate()'>");
for (var intWeeks = 0; intWeeks < 6; intWeeks++){
document.write("<TR style='cursor:hand'>");
for (var intDays = 0; intDays < days.length;intDays++)document.write("<TD></TD>");
document.write("</TR>");
}
document.write("</tbody></table></div>");
}
//定义css
document.write("<style>TABLE{font-family:宋体,SimSun; font-size:9pt;border:0px;bgcolor:#D4D0C8;}.drpdwn {font-family:宋体,SimSun;font-size:9pt;color:#000000;background-color:#000000} SELECT.smallSel{ BACKGROUND-COLOR: #eeeeee; COLOR: #000000; FONT-SIZE:
9pt} .normal{BACKGROUND: #D4D0C8;} .today {font-weight:bold;background-image: url(date.gif);} .satday{color:#800000} .sunday{color:#800000} .days {FONT-SIZE: 9pt;} .Arraw {color:#0000BB; cursor:hand; font-family:Webdings; font-size:9pt}</style>");
getLayer();//显示日期选择器
//选择日期
function selectDate(x){
getObject=x;
newCalendar();
ShowLayer(0,0);//显示出div
}
//number为某实数，n为要保留的小数位数
function myRound(number,n) {
number = Math.round(number*Math.pow(10,n))/Math.pow(10,n);
return number;
}
2、文本框中只能输入数字的函数：
//只能输入数字
//用法 <input name="old" type="text" ONKEYPRESS="event.returnValue=IsDigit();">
function IsDigit()
{
return ((event.keyCode >= 48) && (event.keyCode <= 57));
}
3、去除字符串中的空格的函数：
//去空格函数
//用法 str = cTrim(str,0);
function cTrim(sInputString,iType)
{
var sTmpStr = ' ';
var i = -1;
if(iType == 0 || iType == 1)
{
while(sTmpStr == ' ')
{
++i;
sTmpStr = sInputString.substr(i,1);
}
sInputString = sInputString.substring(i);
}
if(iType == 0 || iType == 2)
{
sTmpStr = ' ';
i = sInputString.length;
while(sTmpStr == ' ')
{
--i;
sTmpStr = sInputString.substr(i,1);
}
sInputString = sInputString.substring(0,i+1);
}
return sInputString;
}
4、在表格上完全屏蔽鼠标右键：
<table oncontextmenu="return(false)">
<tr>
<td>
可在此加入网页元素
</td>
</tr>
</table>
5、取消选取、防止复制：
<body onselectstart="return false">
6、去掉图片链接点击后周围的虚线：
<a href="#" onFocus="this.blur()"><img src="picName.jpg" border=0></a>
7、在子窗口中刷新父窗口：
window.opener.location.reload();
8、设定打开页面的大小：
<body onload="top.resizeTo(300,200);">
<body onload="top.moveBy(300,200);">
9、日期选择器
var months = new Array("一月", "二月", "三月","四月", "五月", "六月", "七月", "八月", "九月","十月", "十一月", "十二月");
var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var days = new Array("星期日","星期一", "星期二", "星期三", "星期四", "星期五", "星期六");
var getObject,oldObject;//取得当前对象
//取得指定年月的天数
function getDays(month, year) {
if (1 == month)
return ((0==year%4)&&(0!=(year%100)))||(0==year%400)?29:28;
else
return daysInMonth[month];
}
//取得今天的年,月,日
function getToday() {
this.now = new Date();
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this.now.getDate();
}
today = new getToday();
//创建日历
function newCalendar() {
today = new getToday();
var parseYear = parseInt(document.all.year[document.all.year.selectedIndex].text);
var newCal = new Date(parseYear,document.all.month.selectedIndex, 1);
var day = -1;
var startDay = newCal.getDay();
var daily = 0;
if ((today.year == newCal.getFullYear()) &&(today.month == newCal.getMonth()))day = today.day;
var tableCal = document.all.calendar.tBodies.dayList;
var intDaysInMonth =getDays(newCal.getMonth(), newCal.getFullYear());
for (var intWeek = 0; intWeek < tableCal.rows.length;intWeek++)
for (var intDay = 0;intDay < tableCal.rows[intWeek].cells.length;intDay++){
var cell = tableCal.rows[intWeek].cells[intDay];
if ((intDay == startDay) && (0 == daily))daily = 1;
if(day==daily)cell.className = "today";//今天的Class
else if(intDay==6)cell.className = "sunday";//周六的Class
else if (intDay==0)cell.className ="satday";//周日的Class
else cell.className="normal";//平常的Class
if ((daily > 0) && (daily <= intDaysInMonth)){
cell.innerText = daily;
daily++;
}else cell.innerText = "";
}
}
//取得鼠标单击处的日期数据
function getDate() {
var sDate;
if ("TD" == event.srcElement.tagName)
if ("" != event.srcElement.innerText){//定义显示日期的格式
sMonth = document.all.month.value;
sDay = event.srcElement.innerText;
if(sMonth.length==1)sMonth = "0"+sMonth;
if(sDay.length==1)sDay = "0"+sDay;
sDate = document.all.year.value + "-" + sMonth + "-" + sDay;
getObject.value=sDate;
window.close();
}
}
//隐藏图层
function HideLayer() {
Layer.style.visibility = "hidden";
}
//显示图层
function LayerShow(){
Layer.style.visibility = "visible";
}
//显示div对象Layer
function ShowLayer(t,l) {
if(oldObject==null)oldObject=getObject;//赋值
if(Layer.style.visibility != "visible" && oldObject==getObject){//判断是否操作同一表
Layer.style.top = t+document.body.scrollTop;
Layer.style.left = l+document.body.scrollLeft;
Layer.style.visibility = "visible";
oldObject=getObject;
}else if(oldObject==getObject){
HideLayer();
}else{
Layer.style.top = t+document.body.scrollTop;
Layer.style.left = l+document.body.scrollLeft;
Layer.style.visibility = "visible";
oldObject=getObject;
}
}
//定义div对象Layer用以显示日期
function getLayer(){
document.write("<div id=/"Layer/" style=/"position:absolute;width:340;z-index:12;boder-color:#ffffff;border:0px outset white;background-color:#D4D0C8;layer-background-color:#D4D0C8;visibility:hidden;height:38;left:58;top:137;/"><input type=/"hidden/" name=/"ret/"><table
width='320' id=/"calendar/" cellpadding=/"0/" align=/"center/"><thead><tr><td height='4'></td></tr><tr><td colspan=7 align=CENTER>请选择月份：<select id=/"month/" onChange=/"newCalendar()/" name=/"select/" class=/"smallSel/">");
for (var intLoop = 0; intLoop < months.length; intLoop++)
document.write("<OPTION VALUE= " + (intLoop + 1) + " " + (today.month == intLoop ? "Selected" : "") + ">" + months[intLoop]);
document.write("</select> 请选择年份：<select id=/"year/" onChange=/"newCalendar()/" name=/"select/" class=/"smallSel/">");
for (var intLoop = today.year-50; intLoop < (today.year + 10); intLoop++)
document.write("<OPTION VALUE= "+intLoop+" "+(today.year == intLoop ? "Selected" : "") + ">" + intLoop);
document.write("</select></td></tr><tr><td height='6'></td></tr><tr class=/"days/">");
document.write("<TD class=sunday>" + days[0] + "</TD>");
for (var intLoop = 1; intLoop < days.length-1;intLoop++)
document.write("<TD>" + days[intLoop] + "</TD>");
document.write("<TD class=sunday>" + days[intLoop] + "</TD>");
document.write(" </tr></thead><tbody border=1 cellspacing=/"0/" cellpadding=/"0/" id=/"dayList/" align=CENTER ONCLICK='getDate()'>");
for (var intWeeks = 0; intWeeks < 6; intWeeks++){
document.write("<TR style='cursor:hand'>");
for (var intDays = 0; intDays < days.length;intDays++)document.write("<TD></TD>");
document.write("</TR>");
}
document.write("</tbody></table></div>");
}
//定义css
document.write("<style>TABLE{font-family:宋体,SimSun; font-size:9pt;border:0px;bgcolor:#D4D0C8;}.drpdwn {font-family:宋体,SimSun;font-size:9pt;color:#000000;background-color:#000000} SELECT.smallSel{ BACKGROUND-COLOR: #eeeeee; COLOR: #000000; FONT-SIZE:
9pt} .normal{BACKGROUND: #D4D0C8;} .today {font-weight:bold;background-image: url(date.gif);} .satday{color:#800000} .sunday{color:#800000} .days {FONT-SIZE: 9pt;} .Arraw {color:#0000BB; cursor:hand; font-family:Webdings; font-size:9pt}</style>");
getLayer();//显示日期选择器
//选择日期
function selectDate(x){
getObject=x;
newCalendar();
ShowLayer(0,0);//显示出div
}
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