<script>

var bIsCatchFlyBar = false;
var dragClickX = 0;
var dragClickY = 0;
var displayway = false;

function show(){
alert("window.event.x:"+window.event.x+"\nwindow.event.y:"+window.event.y+"\nevent.clientX:"+event.clientX+"\nevent.clientY:"+event.clientY+"\nevent.offsetX:"+event.offsetX+"\nevent.offsetY:"+event.offsetY+"\nwindow.event.screenX:"+window.event.screenX+"\nwindow.event.screenY:"+window.event.screenY+"\nscrollleft+x:"+document.body.scrollTop+event.x);
}

function catchFlyBar(e){
 var obj = getSelectorObj('test');
 var objaaa = getSelectorObj('screenFront');
 screenChange(objaaa);
 objaaa.style.visibility="visible";
 bIsCatchFlyBar = true;
 var x=event.x+document.body.scrollLeft;
 var y=event.y+document.body.scrollTop;
 dragClickX=x-obj.offsetLeft;
 dragClickY=y-obj.offsetTop;
 obj.setCapture();
 document.onmousemove  = onmousemove1;
 document.onmouseup  = onmouseup1;
}

function getSelectorObj(name){
 var obj;
 if (document.layers){
  obj = document.layers[name];
    }
    else if (document.all){
  obj = document.all[name];
    }
    else if (document.getElementById){
        obj = document.getElementById(name);
    }
 return obj;
}

function onmouseup1(){
 var obj = getSelectorObj('test');
 var objaaa = getSelectorObj('screenFront');
 screenChange(objaaa);
 objaaa.style.visibility="hidden";
 bIsCatchFlyBar = false;
 obj.releaseCapture();
}

function onmousemove1(){
 if(bIsCatchFlyBar){
  var obj = getSelectorObj('test');
   obj.style.left = event.x+document.body.scrollLeft-dragClickX; 
   obj.style.top = event.y+document.body.scrollTop-dragClickY;
 }
}

function screenChange(obj)
{
 obj.style.left=0;
 obj.style.top=0;
 obj.style.height=document.body.scrollHeight;
 obj.style.width=document.body.scrollWidth;
}
</script>
<div id="screenFront"  style="position:absolute;visibility:hidden;width:100%;height:100%;background: #000000;filter:alpha(opacity=50)"></div><div  id="test" style="position:absolute;left:100;top:100">
<table border=1 cellpadding=15 cellspacing=15 >
<tr><td>
<table><tr style="cursor:move"  nowrap onMouseDown="catchFlyBar()"><td>Click here to show. </td></tr></table>
</div>
</td></tr>
</table>