function roll(imgName,imgSrc,curImg)
{

if (imgName==curImg)
{
//document.write("bla");
}else{
document[imgName].src=imgSrc;
}
}



function popup(url)  
{
window.open(url,'',"toolbar=no,title=no,width=475,height=300,directories=no,resizable=no,status=no,scrollbars=no, menubar=no,location=no,left=30,top=30");
}


function popup2()  
{
window.open("tip.php",'',"toolbar=no,title=no,width=852,height=688,directories=no,resizable=yes,status=no,scrollbars=no, menubar=no,location=no,left=30,top=30");
}


function toggleDiv(divid){
    if(document.getElementById(divid).style.display == 'none'){
      document.getElementById(divid).style.display = 'block';
    }else{
      document.getElementById(divid).style.display = 'none';
    }
  }