function changecss(i)
 {
    var count=4;
	for(var n=1;n<=count;n++)
	{
		if(n==i)
		{
			document.getElementById("bd_tit"+n).className="ilightMenu-bg";
		
		}
		else
		{
			document.getElementById("bd_tit"+n).className="menunormal";
		}
	}
  }