var ns6=document.getElementById&&!document.all;
//Get previous and actual element 
var previous = '';
var elemento = '';
function setColorPrevious(input){
	input.style.backgroundColor="white";
}
function highlight(input){
	input.style.backgroundColor="yellow";
}
function verify(){
	if (document.forms['contact'].name.value ==''){
		elemento = document.forms['contact'].name;
		if (previous!=elemento && previous!='')
			setColorPrevious(previous);
		previous = elemento;
		document.forms['contact'].name.focus();
		highlight(document.forms['contact'].name);
		return false;
	}
	if (document.forms['contact'].email.value ==''){
		elemento = document.forms['contact'].email;
		if (previous!=elemento && previous!='')
			setColorPrevious(previous);
		previous = elemento;
		document.forms['contact'].email.focus();
		highlight(document.forms['contact'].email);
		return false;
	}
	if (document.forms['contact'].mess.value ==''){
		elemento = document.forms['contact'].mess;
		if (previous!=elemento && previous!='')
			setColorPrevious(previous);
		previous = elemento;
		document.forms['contact'].mess.focus();
		highlight(document.forms['contact'].mess);
		return false;
	}
	return true;
}

function send(){
	if (verify())
		document.forms['contact'].submit();
}