function cambiaLingua(lang){
		
		var loc ="";
		if(jQuery.url.param("lang") == null){
			if(jQuery.url.attr("query") == null){
				loc ="?lang="+lang;
			}
			else{
				var tmp = window.location.toString();
				loc = tmp + "&lang="+lang;
			}	
		}
		else{
			
			var tmp =window.location.toString();
			var pieces = tmp.split("?");
			var variables = pieces[1];
			
			
			var allVars = variables.split("&");
			
			var rep ="";
			
			for(i = 0; i < allVars.length; i++){
				var curr = allVars[i];
				var p = curr.split("=");
				if (p[0] == "lang") {
					rep = p[1];
					break;
				}	
			}
			
			tmp = tmp.replace("lang="+ rep,"lang="+lang);
			loc = tmp;
		}
		
		window.location = loc;
	}