同上
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var ms=0;
function did(obj){//¿ØÖÆÒ³ÃæµÄÒªËصÄÒƶ¯
ms=obj;
event.srcElement.setCapture();
x=document.all(ms).style.pixelLeft-event.x;
y=document.all(ms).style.pixelTop-event.y;
}

function document.onmousemove(){
if(ms!=""){
document.all(ms).style.pixelLeft=x+event.x;
document.all(ms).style.pixelTop=y+event.y;
}
}

function document.onmouseup(){
if(ms!=""){
event.srcElement.releaseCapture();
ms=0;
}
}

调用方式在需要调用的要素里面加上
onmousedown=did("要素的ｉｄ")及可
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我的最简单了。

function drag_layer(layer_id)
{
with(layer_id){
style.pixelLeft=window.event.clientX+window.document.body.scrollLeft-10;
style.pixelTop=window.event.clientY+window.document.body.scrollTop-10;
}
}