var  ms=0;  
function  did(obj)
{
    ms=obj;  
    event.srcElement.setCapture();  
    x=document.all(ms).style.pixelLeft-event.clientX;  
    y=document.all(ms).style.pixelTop-event.clientY;  
}  
 
function  document.onmousemove()
{  
    if(ms!="")
    {  
    document.all(ms).style.pixelLeft=x+event.clientX;  
    document.all(ms).style.pixelTop=y+event.clientY;  
    }  
}  
 
function  document.onmouseup()
{  
    if(ms!="")
    {  
    event.srcElement.releaseCapture();  
    ms=0;  
    }  
}