function getOs()
{
   if(navigator.userAgent.indexOf("MSIE")>0)return 1;
   if(isFirefox=navigator.userAgent.indexOf("Firefox")>0)return 2;
   if(isSafari=navigator.userAgent.indexOf("Safari")>0)return 3;   
   if(isCamino=navigator.userAgent.indexOf("Camino")>0)return 4;
   if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0)return 5;
   return 0;
}

function over(hidID,dhID){
	var hidID = document.getElementById(hidID);
	var dhID = document.getElementById(dhID);
	if(getOs()=="1")
	{
	   hidID.style.top=(dhID.offsetTop+28+dhID.offsetWidth)+"px";
	   hidID.style.left=(dhID.offsetLeft+312+(screen.width-1024)/2)+"px";
	}
	else
	{
	   hidID.style.top=(dhID.offsetTop+22)+"px";
	   hidID.style.left=(dhID.offsetLeft-1)+"px";
	}
	hidID.style.display="block";
	
	}
function out(hidID,dhID){
	var hidID = document.getElementById(hidID);
	var dhID = document.getElementById(dhID);
	hidID.style.display="none";
	}