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

function verificaemail(){	
	var local = document.getElementById('resposta');	
	var email = document.getElementById('email').value;
	var url = "php/verificaemail.php?email=" + escape(email);	
	XMLHRO.open("GET", url, true);	
	XMLHRO.onreadystatechange = function(){
		
		if(email == ""){
			local.innerHTML = "";
		} else if(email.indexOf('@')==-1 || email.indexOf('.')==-1 ){
			local.innerHTML = "<span style='color: #FF0000; font-weight: bold;'>Inválido!</span>";
		} else {
			if(XMLHRO.readyState == 1 || XMLHRO.readyState == 2 || XMLHRO.readyState == 3){
				local.innerHTML = "<span style='font-weight: bold;'>Verificando...</span>";
			} else {
				var conteudo = XMLHRO.responseText;
				if(conteudo == '1'){
					local.innerHTML = "<span style='color: #FF0000; font-weight: bold;'>Já existente!</span>";
					document.getElementById('emailr').value = 1;
				}else{
					local.innerHTML = "<span style='color: #006600; font-weight: bold;'>Ok!</span>";
					document.getElementById('emailr').value = 0;
				}
			}
		}
		
		if( document.dados.tx_email.value=="" || document.dados.tx_email.value.indexOf('@')==-1 || document.dados.tx_email.value.indexOf('.')==-1 )
		{
		alert( "Preencha campo E-MAIL corretamente!" );
		document.dados.tx_email.focus();
		return false;
		}
		
	}	
	XMLHRO.send(null);	
}