var Obj='' 
document.onmouseup=MUp 
document.onmousemove=MMove 

function MDown(Object){ 

Obj=Object.id 
document.all(Obj).setCapture();
pX=event.x-document.all(Obj).style.pixelLeft; 
pY=event.y-document.all(Obj).style.pixelTop; 
} 

function MMove(){ 
if(Obj!=''){ 
document.all(Obj).style.left=event.x-pX; 
document.all(Obj).style.top=event.y-pY; 
} 
} 

function MUp(){ 
if(Obj!=''){ 
document.all(Obj).releaseCapture(); 
Obj=''; 
} 
}