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

	//  Following transition classes will be declared:
	//
	//	classname		  screenwidth
	//	------------------------------------------
	//	pda_v			  240px					

	function setScreenClass(){
		var fmt = document.documentElement.clientWidth;
		var cls = (fmt<=940)?'fluid_940':'foro';
		document.body.className=cls;
	};