<!------------------Show Menu Function Start-------------------->
function dropit(index)
{    
	//if(drop_menu.style.visibility=="hidden")
	//{
	hidemenu();
		document.getElementById("drop_menu"+index).style.left=document.body.scrollLeft+event.clientX-event.offsetX 
		document.getElementById("drop_menu"+index).style.top=document.body.scrollTop+event.clientY-event.offsetY+25   
		//drop_menu.filters.revealTrans.apply()    
		document.getElementById("drop_menu"+index).style.visibility="visible"    
		//drop_menu.filters.revealTrans.play()
	//}
	//else
	//{
		//hidemenu()
	//}    
}
<!------------------Show Menu Function End---------------------> 


<!------------------Hidden Menu Function Start-----------------> 
function hidemenu()
{    
	//drop_menu.filters.revealTrans.stop()  
	for (i=0;i<6;i++) 
	{ 
		document.getElementById("drop_menu"+i).style.filter='Alpha(Opacity=90)';
		document.getElementById("drop_menu"+i).style.visibility="hidden";
	}
		
}    
<!------------------Hidden Menu Function End------------------->


<!--------------Set Menu Background's Color Start-------------->
function ovrCell(eItem)
{
  eItem.style.backgroundColor="#999999";
}
function outCell(eItem)
{
  eItem.style.backgroundColor="#E8E8E8";
}
<!--------------Set Menu Background's Color End---------------->

<!--------------Start of function open login window------------------------------>
function openlogin()
{
	window.open("/bshome/servlet/userlogin","Wlogin","toolbar=no,resizable=yes,status=yes,scrollbars=yes,width=500,height=200,x=200,y=200");
}
<!--------------End of function open login window------------------------------>