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<script>
//对指定的元素绑定move事件
/*-----------------------------
onmousemove="dropmovehand("divname", 225);"
onmousedown="drops教程tarthand();"
onmouseup="dropstophand();"
-----------------------------*/
function dropstarthand()
{
 canmove = (canmove ? false : true);
}
function dropstophand()
{
 canmove = false;
}
function dropmovehand(objid, mleftleaning)
{
 var event = getevent();
 var obj = $obj(objid);
 if(!canmove) return;
 
 if($nav()=="ie")
 {
  var posleft = event.clientx-20;
  var postop = event.clienty-20;
  postop += document.body.scrolltop;
 }
 else
 {
  var posleft = event.pagex-20;
  var postop = event.pagey-20;
 }
 obj.style.top = postop;
 obj.style.left = posleft - mleftleaning;
}

</script>

本文来源：http://www.gdgbn.com/bangongshuma/27515/