JavaScript拖动层跟缩放层(完美版)
日期：2014-05-16 浏览次数：20327 次
JavaScript拖动层和缩放层(完美版)
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Js层拖动 - www.codefans.net</title>
<style>
*{margin:0;padding:0;}
#zhezhao{
width:100%;
height:100%;
background:#f00;
filter:alpha(opacity:0);
opacity:0;
z-index:9999;
position:absolute;
top:0;
left:0;
display:none;
}
#div2{
width:200px;
height:200px;
position:relative;
background:#EEEEEE;
border:1px solid #f00;
}
#div1{
width:15px;
height:15px;
background:#99CC00;
position:absolute;
right:0px;
bottom:0px;
cursor:nw-resize;
overflow:hidden;
font-size:12px;
text-align:center;
line-height:15px;
color:#FFFFFF;
float:right;
z-index:3;
}
#right{
width:15px;
height:100%;
background:#f00;
float:right;
position:absolute;
right:0;
top:0;
cursor:e-resize;
overflow:hidden;
filter:alpha(opacity:0);
opacity:0;
z-index:1;
}
#bottom{
width:100%;
height:15px;
background:#f00;
position:absolute;
left:0;
bottom:0;
cursor:n-resize;
overflow:hidden;
filter:alpha(opacity:0);
opacity:0;
z-index:1;
}
#div2 p{
padding:10px;
line-height:24px;
font-size:13px;
text-indent:24px;
color:#996600;
}
#div2 h2{
width:100%;
height:25px;
line-height:25px;
font-size:14px;
background:#CC9900;
color:#FFFFFF;
text-indent:15px;
cursor:move;
overflow:hidden;
}
</style>
<script type="text/javascript">
window.onload=function()
{
var oDiv=document.getElementById("div1");
var oDiv2=document.getElementById("div2");
var zhezhao=document.getElementById("zhezhao");
var h2=oDiv2.getElementsByTagName("h2")[0];
var right=document.getElementById("right");
var bottom=document.getElementById("bottom");
var mouseStart={};
var divStart={};
var rightStart={};
var bottomStart={};
//往右拽
right.onmousedown=function(ev)
{
var oEvent=ev||event;
mouseStart.x=oEvent.clientX;
mouseStart.y=oEvent.clientY;
rightStart.x=right.offsetLeft;
if(right.setCapture)
{
right.onmousemove=doDrag1;
right.onmouseup=stopDrag1;
right.setCapture();
}
else
{
document.addEventListener("mousemove",doDrag1,true);
document.addEventListener("mouseup",stopDrag1,true);
}
};
function doDrag1(ev)
{
var oEvent=ev||event;
var l=oEvent.clientX-mouseStart.x+rightStart.x;
var w=l+oDiv.offsetWidth;
if(w<oDiv.offsetWidth)
{
w=oDiv.offsetWidth;
}
else if(w>document.documentElement.clientWidth-oDiv2.offsetLeft)
{
w=document.documentElement.clientWidth-oDiv2.offsetLeft-2;
}
oDiv2.style.width=w+"px";
};
function stopDrag1()
{
if(right.releaseCapture)
{
right.onmousemove=null;
right.onmouseup=null;
right.releaseCapture();
}
else
{
document.removeEventListener("mousemove",doDrag1,true);
document.removeEventListener("mouseup",stopDrag1,true);
}
};
//往下拽
bottom.onmousedown=function(ev)
{
var oEvent=ev||event;
mouseStart.x=oEvent.clientX;
mouseStart.y=oEvent.clientY;
bottomStart.y=bottom.offsetTop;
if(bottom.setCapture)
{
bottom.onmousemove=doDrag2;
bottom.onmouseup=stopDrag2;
bottom.setCapture();
}
else
{
document.addEventListener("mousemove",doDrag2,true);
document.addEventListener("mouseup",stopDrag2,true);
}
};
function doDrag2(ev)
{
var oEvent=ev||event;
var t=oEvent.clientY-mouseStart.y+bottomStart.y;
var h=t+oDiv.offsetHeight;
if(h<oDiv.offsetHeight)
{
h=oDiv.offsetHeight;
}
else if(h>document.documentElement.clientHeight-oDiv2.offsetTop)
{
h=document.documentElement.clientHeight-oDiv2.offsetTop-2;
}
oDiv2.style.height=h+"px";
};
function stopDrag2()
{
if(bottom.releaseCapture)
{
bottom.onmousemove=null;
bottom.onmouseup=null;
bottom.releaseCapture();
}
else
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