var Win = (navigator.appVersion.indexOf("Windows") != -1);
var Mac = (navigator.appVersion.indexOf("Macintosh") != -1);
var IE  = (navigator.appVersion.indexOf("MSIE") != -1) && !(navigator.userAgent.indexOf("Opera") != -1);
var Firefox = (navigator.userAgent.indexOf("Firefox") != -1);
var NS  = (navigator.userAgent.indexOf("Netscape") != -1);
var Opera = (navigator.userAgent.indexOf("Opera") != -1);
var Safari = (navigator.appVersion.indexOf("Safari") != -1);
var NC = (navigator.appName.indexOf("Netscape") != -1) && !(navigator.userAgent.indexOf("Netscape") != -1) && !(navigator.appVersion.indexOf("Safari") != -1);
var Konqueror = (navigator.userAgent.indexOf("Konqueror") != -1);
var BrowserType;

function getWinH(){
	if(document.all || NS || Firefox || Safari){
		return(document.body.clientHeight);
	} else if(document.layers){
			return(innerHeight);
	} else  { return(-1); }	
}

var scrH = getWinH();
var adjuster;

if (scrH > 520) {
	adjuster = (scrH-450)/2;
	adjuster = parseInt(adjuster) - 60;
	document.getElementById('spacer').style.height = adjuster;
}