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

	//  Following transition classes will be declared:
	//
	//	classname		  screenwidth
	//	------------------------------------------
	
	//  iphone            480px -  320px
	//	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<=240)?'pda_ver':(fmt>240&&fmt<=320)?'pda_hor':(fmt>320&&fmt<=800)?'screen_low':(fmt>800&&fmt<=1024)?'screen_med':(fmt>1024&&fmt<=1280)?'screen_high':'screen_wide';
		
		document.body.className=cls;
	};