function testRes(){
	// Take a look at
	//http://www.webdevtips.co.uk/webdevtips/faq/javascript/index.shtml
	//
	//opera Netscape 6 Netscape 4x Mozilla 
	if (window.innerWidth || window.innerHeight){ 
		docwidth = window.innerWidth; 
		docheight = window.innerHeight; 
		} 
	//IE Mozilla 
	if (document.body.clientWidth || document.body.clientHeight){ 
		docwidth = document.body.clientWidth; 
		docheight = document.body.clientHeight; 
		}
	if(docwidth<=800) {	
		alert("Your screen resolution is too small.\nPlease resize it to at least 1024x768 for optimal browsing.\nThank you");
	}
}