function Showmenu(imgid,imgName)
{
   document.getElementById(imgid).src=imgName;
}
function PopupMap(strurl)
 {  
    toleft= window.screen.width/2-150;
    totop=window.screen.height/2-150;
    window.open(strurl,'Popup','height =400,width =350,left='+toleft+',top='+totop);
 }