if (navigator.userAgent.indexOf('Win') != -1)    
   var OpSys = "Win";   
else
{  if (navigator.userAgent.indexOf('Mac') != -1)
	{
                 var OpSys = "Macintosh";
    }
}

if (OpSys == "Macintosh")
	document.write('<link href="stylemac.css" rel="styleSheet" type="text/css">');
else {	
if (navigator.appName.indexOf('Netscape') != -1)
	document.write('<link href="stylenet.css" rel="styleSheet" type="text/css">');
}
//if (navigator.appVersion.indexOf('Mac') != -1)
	//document.write('<link href="stylemac.css" rel="styleSheet" type="text/css">'); 
//if (navigator.appName.indexOf('Netscape') != -1)
	//document.write('<link href="stylenet.css" rel="styleSheet" type="text/css">'); 

//for displaying search box**********************************************************
function setDisplay(objectID,state) {
		var object = document.getElementById(objectID);
		object.style.display = state;
	}
	
function toggleDisplay(objectID) {
	var object = document.getElementById(objectID);
	state = object.style.display;
	if (state == 'none')
	object.style.display = 'block';
	else if (state != 'none')
	object.style.display = 'none';
	}