var InternetExplorer = navigator.appName.indexOf("Microsoft") != -1;

function openLegal() {
        window.open('legal.html','legal','width=563,height=739','menubar=no,toolbar=no,status=no,scrollbars=no,resizable=no,')
}

function openWin(html,name,w,h,features) {
        x = (screen.availWidth - w) / 2
        y = (screen.availHeight - h - 100) / 2 
        win = window.open(html,name,'width='+w+',height='+h+','+features)
        if(InternetExplorer) {win.moveTo(x,y)}
                win.focus()
        }



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) {
		acc_over = newImage("roll/acc_on.gif");
		college_over = newImage("roll/college_on.gif");
		five_over = newImage("roll/five_on.gif");
		how_over = newImage("roll/how_on.gif");
		self_over = newImage("roll/self_on.gif");

		preloadFlag = true;
	}
}