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

	//  Following transition classes will be declared:
	//
	//	classname		  screenwidth
	//	------------------------------------------
	//	small			        <= 639px	
	//	standard		  640px - 1280px	
	//	wide     				> 1280px			

	function setScreenClass(){
		var fmt = document.documentElement.clientWidth;
		var cls = (fmt<=639)?'small':(fmt>640&&fmt<=1320)?'standard':'wide';
		/*document.getElementById('count').innerHTML=fmt+'px -> '+cls;*/
		document.body.className=cls;
	};