//AJAX - CRIA OBJETO
var XMLHRO = false;
	
try{
	XMLHRO = new ActiveXObject("MSXML2.XMLHTTP");
} catch(exception1) {
	try{
		XMLHRO = new ActiveXObject("Microsoft.XMLHTTP");
		
	} catch(exception2) {
		XMLHRO = false;
	}
}

if(window.XMLHttpRequest){
	XMLHRO = new XMLHttpRequest();
}
//AJAX - CRIA OBJETO

function emailExiste(){	
	
	var email = document.form.email.value;
	var url = "php/verificaemail.php?email=" + escape(email);	

	if(email != ""){
		XMLHRO.open("GET", url, true);	
		XMLHRO.onreadystatechange = function(){
			var conteudo = XMLHRO.responseText;
			document.getElementById('emailok').value = conteudo;
		}
	}
	XMLHRO.send(null);	
}