window.onload = setScreenClass; 
	window.onresize = setScreenClass;

	//  Following transition classes will be declared:
	//
	//	classname		  screenwidth
	//	------------------------------------------
	//	pda_v			  240px			
	//	pda_h			  320px			
	//	ultralow		  320px -  640px	
	//	screen_lo		  640px -  800px	
	//	screen_med		  800px - 1024px	
	//	screen_hi		 1024px - 1280px	
	//	screen_wide				> 1280px			

	function setScreenClass(){
		var fmt = document.documentElement.clientWidth;
		var cls = (fmt<=1000)?'screen_med':'screen_wide';
		//document.getElementById('count').innerHTML=fmt+'px -> '+cls;
		document.body.className=cls;
	};