javascript 鼠标拖动图标技术

这个例子简单讲就是鼠标拖动图标到它任意想去的地方
代码

 
<body> 
<div id="block" style="width:100px; height:100px; position:relative; background-color:#FF0000";></div> 
<script> 
var bb = document.getElementById("block"); 
bb.onmousedown = function(){ 
//获取鼠标当前坐标 
var pageX = event.clientX; 
var pageY = event.clientY; 
//获取block的坐标，左边界和上边界 
var offX = parseInt(this.style.left)||0; 
var offY = parseInt(this.style.top)||0; 
//计算出鼠标坐标相对于block坐标的间距 
var offLX = pageX-offX; 
var offLY = pageY-offY; 
if(!document.onmousemove){ 
document.onmousemove = function(){ 
bb.style.left=event.clientX-offLX; //设置block的X坐标 
bb.style.top=event.clientY-offLY; //设置block的Y坐标 
} 
} 
} 
document.onmouseup = function(){document.onmousemove = null;} //鼠标弹起 
</script> 
</body> 

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发布时间 2010-02-07 14:22:41