JavaScript: Detect Mobile Browser

Detect mobile browser with "detectmobilebrowser.com". with functions according

if(jQuery.browser)
	{
		/* SmileyWar.com Mobile Orientation Detection */

		// set rules on initial load and when the screen changes size or orientation.
		$(window).on("load resize",function(){
			var h = $(window).height();
			var w = $(window).width();

			if ( w < 768) {
				// small mobile screens
				if(w > h) {
					// small mobile screens landscape rules
				}else{
					// small mobile screens portrait rules
				}
			// all small screen rules
			}else{
				// large mobile screens
				if(w > h) {
					// large mobile screen landscape rules
				}else{
					// large mobile screen portrait rules
				}
				// all large mobile screen rules
			}
		});
	}