function getScreenSize() {
	var isWin9X = (navigator.appVersion.toLowerCase().indexOf('windows 98')+1);
	var isIE = (navigator.appName.toLowerCase().indexOf('internet explorer')+1?1:0);
	var isOpera = (navigator.userAgent.toLowerCase().indexOf('opera')+1?1:0);
	if (isOpera) isIE = false;
	var isSafari = (navigator.appVersion.toLowerCase().indexOf('safari')+1?1:0);

	var obj = new Object();

	if (!isSafari && !isOpera) {
		obj.x = document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth;
		obj.y = document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight;
	} else {
		obj.x = window.innerWidth;
		obj.y = window.innerHeight;
	}

	return obj;
}