function popWin(url,winname,w,h,scroll){
	var LeftPosition = (screen.width)?(screen.width-w)/2:100;
	var TopPosition = (screen.height)?(screen.height-h)/2:100;
	settings = 'width='+ w +',height='+ h +',top='+ TopPosition +',left='+ LeftPosition +',scrollbars='+ scroll +',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
	win = window.open(url, winname, settings);
	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 preload() {
	nvideo = newImage("images/but_watch_on.gif");
	preloadflag = true;
}