window.onload = function(){setScreenClass();}; 
	window.onresize = setScreenClass;

	//  Following transition classes will be declared:
	//
	//	classname		  screenwidth
	//	------------------------------------------
	//	screen_lo		  529px - 764px	
	//	screen_med		  764px - 979px	
	//	screen_hi				> 979px			


	function setScreenClass(){
		var fmt = document.documentElement.clientWidth;
		var cls = (fmt<=529)?'screen_scroll':(fmt>529&&fmt<=764)?'screen_lo':(fmt>764&&fmt<=979)?'screen_med':'screen_hi';
		document.getElementById('count').innerHTML=fmt+'px -> '+cls;
		document.body.className=cls;
	};