function load(url,idobj)
    {
        if (window.ActiveXObject) // IE
        	req = new ActiveXObject("Microsoft.XMLHTTP");
        else if (window.XMLHttpRequest) // FF
        	req = new XMLHttpRequest();
        
		
		
        req.onreadystatechange=function() 
        {
		
            if (req.readyState==4)
            {
				pageTracker._trackPageview(url);
                var objeto = document.getElementById(idobj);
                objeto.innerHTML = req.responseText;
            }
		   }
        
        req.open("GET", url, true);
        req.send(null);
	
    }
	
	

function enviamail(){
var nome = document.getElementById("nome").value;
var email = document.getElementById("email").value;
var tel = document.getElementById("tel").value;
var msg = document.getElementById("msg").value;
if (nome == "" || email == "" || tel == "" || msg == ""){
alert("Preencha os campos antes de enviar.");

}

}