JavaScript中我方法这么写的怎么鼠标拖不动

function pageload(eve){
var odiv =document.getElementById('divtest');
            addEvent(odiv,"mousedown",function(eve){
var e=window.event||eve;
var target = e.srcElement ||e.target;
target.style.cursor="move";
var x=parseInt(odiv.style.left.replace(/px/gi,''),10);
var y=parseInt(odiv.style.top.replace(/px/gi,''),10);
var deltaX=eve.clientX-x;
var deltaY=eve.clientY-y;
var movehandler=addEvent(document,"mousemove",function(em){
var em=window.event||em;
target.style.top=(em.clientY-deltaY)+'px';
target.style.left=(em.clientX-deltaX)+'px';
stopEvent(em); });
var uphandler=addEvent(document,"mouseup",function(eu){
var eu=window.event||eu;
removeEvent(document,"mousemove",movehandler);
removeEvent(document,"mouseup",uphandler);
stopEvent(eu);});})我方法这么写的怎么鼠标拖不动

是不是DIV没有写内联的left,top，就是没有写style="left:2px;top:2px;"

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