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仿淘宝图片放大预览效果

2012-11-07 15:44 197 查看
<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=GBK" />

<title></title>

</head>

<script language="JavaScript">

<!--

var srcX = 2592; //原图大小,可以任意设置

var srcY = 1944;

var bigX = 500; //预览窗大小,可以任意设置

var bigY = 375;

var smallX = 500; //缩略图宽度

var smallY = srcY * smallX / srcX;

var viewX = bigX / srcX * smallX; //预览范围

var viewY = bigY / srcY * smallY;

var bl = srcX / smallX;//缩小比例

var border = 1; //边框

window.onload=function (){

//head.innerHTML="图片载入";

smallpic.width=smallX;

smallpic.height=smallY;

bigpic.width=srcX;

bigpic.height=srcY;

view.style.width=viewX;

view.style.height=viewY;

smallbox.style.borderWidth=border;

bigbox.style.borderWidth=border;

if (window.event){

smallbox.style.width=smallpic.offsetWidth+border*2;

smallbox.style.height=smallpic.offsetHeight+border*2;

bigbox.style.width=bigX+border*2;

bigbox.style.height=bigY+border*2;

}else{

smallbox.style.width=smallpic.offsetWidth;

smallbox.style.height=smallpic.offsetHeight;

bigbox.style.width=bigX;

bigbox.style.height=bigY;

}

move(event);

}

function move(e){

var e = window.event?window.event:e;

var iebug = 0;

if (window.event){

var vX = e.offsetX - viewX/2;

var vY = e.offsetY - viewY/2;

}else{

var vX = e.pageX - viewX/2 - smallbox.offsetLeft - border;

var vY = e.pageY - viewY/2 - smallbox.offsetTop - border;

iebug = 2;

}

if (vX  < 0) vX = 0;

if (vY  < 0) vY = 0;

if (vX > smallX - viewX - iebug) vX = smallX - viewX - iebug;

if (vY > smallY - viewY - iebug) vY = smallY - viewY - iebug;

bigpico.style.marginLeft = - vX * bl

bigpico.style.marginTop = - vY * bl

view.style.left = vX + smallbox.offsetLeft + border;

view.style.top = vY + smallbox.offsetTop + border;

}

function aa(){

document.getElementById('bigbox').style.display="none";

document.getElementById('view').style.border="none";

}

function bb(){

document.getElementById('bigbox').style.display="block";

document.getElementById('view').style.border="1px solid #FF9900";

//document.getElementById('view').style.background="#009999";

// document.getElementById('view').style.filter="alpha(opacity=40)";

}

//-->

</script>

<style type="text/css">

<!--

*{padding:0;margin:0;}

img{display:block;}

#smallbox{border:1px #EBEBEB solid;overflow:hidden; width:350px; position:relative;}

#bigbox{border:1px #EBEBEB solid;overflow:hidden; position:absolute; left:500px; top:0px; display:none}

#view{position:absolute;}

//-->

</style>

<body>

<div id="smallbox"  onMouseOver="bb()" onMouseOut="aa()"> <img src="落花.jpg" name="smallpic" border="0" id="smallpic" onMouseMove="move(event)">

<div id="view" onMouseMove="move(event)" onMouseOver="bb()" onMouseOut="aa()" > </div>

</div>
<div id="bigbox"> <div id="bigpico"> <img src="落花.jpg" name="bigpic"border="0" id="bigpic"> </div>

</div>

</body>

</html>
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