// Menu rollovers and preloader

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		company_over = newImage("/images/menubar/company-over.gif");
		solutions_over = newImage("/images/menubar/solutions-over.gif");
		research_over = newImage("/images/menubar/research-over.gif");
		media_over = newImage("/images/menubar/media-over.gif");
		contact_over = newImage("/images/menubar/contact-over.gif");
		glossary_over = newImage("/images/sidetools-glossary-over.gif");
		sitemap_over = newImage("/images/sidetools-sitemap-over.gif");
		search_over = newImage("/images/sidetools-search-btn-over.gif");
		careers_over = newImage("/images/sidetools-careers-over.gif");
		preloadFlag = true;
	}
}



// New window opener

function NewWindow(mypage, myname, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no,resizable=yes'
	win = window.open(mypage, myname, winprops)
	win.opener = window;
	if (parseInt(navigator.appVersion) >= 4) { 
		win.window.focus(); 
	}
}




// The Central Randomizer 1.3 (C) 1997 by Paul Houle (houle@msc.cornell.edu)
// See:  http://www.msc.cornell.edu/~houle/javascript/randomizer.html

rnd.today=new Date()
rnd.seed=rnd.today.getTime()

function rnd() {
        rnd.seed = (rnd.seed*9301+49297) % 233280;
        return rnd.seed/(233280.0);
}

function rand(number) {
        return Math.ceil(rnd()*number);
}