function login(){
	var user = document.getElementById("user").value;
	var pass = document.getElementById("pass").value;
	if(user == "" || pass == ""){
		alert("Por favor, introduzca usuario y contrase\u00f1a.");
	}else{
		if(!isNaN(user)){
			var h = 6-user.length;
			for(var i = 0; i < h; i++){
				user = "0"+user;
			}
			document.getElementById("user").value = user;
		}
		checkCif("pass");
		pass = document.getElementById("pass").value;
		var data = "user="+user+"&pass="+pass;
		callAjaxPOST(loginCallback, "login", data);
	}
}

function loginCallback(xmlhttp){
	var element = xmlhttp.responseXML.getElementsByTagName("success")[0];
	if(element.getAttribute("value")==1){
		document.location.reload(true);
	}else{
		alert("El usuario o contrase\u00f1a no es correcto.");
	}
}

function clicked(keyCode){
	switch(keyCode){
		case 13: //Enter
			login();
			break;
	}
}