//Carica l'oggetto classe
function getStyle(className) {   
	for(var i=0; i< document.styleSheets.length; i++){
		var classes = document.styleSheets[i].rules || document.styleSheets[i].cssRules;
		for(var x=0;x<classes.length;x++) {     
			if(classes[x].selectorText==className) {                
				return classes[x];
			}    
		}
	}
	return null;
}