function checkMail(mail){
		var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
		if(typeof(mail) == "string"){
			if(er.test(mail)){ 
				return true
			}
		}else if(typeof(mail) == "object"){
			if(er.test(mail.value)){ 
						return true; 
					}
		}else{
			return false;
			}
	}
	function EmailValid(){
		var mail = document.getElementById("email");
		
		if(!checkMail(mail.value)){
			document.getElementById("msg").innerHTML = "Email incorreto";
		}else{
			if(mail.value.indexOf("@gmail") > 3){
				mail.value = mail.value.substr(0, mail.value.indexOf("@gmail") ) + "@gmail.com";
			}
			if(mail.value.indexOf("@hotmail") > 3){
				mail.value = mail.value.substr(0, mail.value.indexOf("@hotmail") ) + "@hotmail.com";
			}
			if(mail.value.indexOf("@yahoo") > 3){
				mail.value = mail.value.substr(0, mail.value.indexOf("@yahoo") ) + "@yahoo.com";
			}
			document.getElementById("msg").innerHTML = "OK";
		}
	}