// open centered window
function openWindow(theURL,winName,winWidth,winHeight,otherFeatures) {
   var x = 0;
   var y = 0;
   x = (screen.availWidth - 12 - winWidth) / 2;
   y = (screen.availHeight - 48 - winHeight) / 2;
   if (otherFeatures != "") {otherFeatures = "," + otherFeatures}
   var features = "screenX=" + x + ",screenY=" + y + ",width=" + winWidth + ",height=" + winHeight+",top="+y+",left="+x+"'" + otherFeatures
   var NewWindow = window.open(theURL,winName,features);
   NewWindow.focus();
}	

// no span email
function nospam(user,domain,args) {
	loc = "mailto:" + user + "@" + domain;
	if (args) {
		loc += "?" + args;
	}
	window.location = loc;
}

// image rollovers
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) {		
			buy_now_over = newImage("images/nav/buy_now-over.gif");		
			faqs_over = newImage("images/nav/faqs-over.gif");		//nav		
			avail_over = newImage("images/nav/avail_OVER.gif");				
			jpg_over = newImage("images/nav/jpg_OVER.gif");					
			cou_over = newImage("images/nav/cou_OVER.gif");								
			eps_over = newImage("images/nav/eps_OVER.gif");				
			free_over = newImage("images/nav/free_OVER.gif");		
			gif_over = newImage("images/nav/gif_OVER.gif");						
			ppt_over = newImage("images/nav/ppt_OVER.gif");				
			proglo_over = newImage("images/nav/proglo_OVER.gif");				
			reg_over = newImage("images/nav/reg_OVER.gif");						
			uscan_over = newImage("images/nav/us-can_OVER.gif");					
			uscou_over = newImage("images/nav/us-cou_OVER.gif");						
			ussta_over = newImage("images/nav/us-sta_OVER.gif");		
			preloadFlag = true;	
		}}