function checkform(f) {
        if (f.fullname.value == "") {
            alert( "_KMS_WEB_WEBFORM_CHECKERROR");
            f.fullname.focus();
            return false;
          }

        if (f.email.value == "") {
            alert( "_KMS_WEB_WEBFORM_CHECKERROR");
            f.email.focus();
            return false;
          }
	if (!checkEmail()) {
            alert( "_KMS_WEB_WEBFORM_CHECKERROR");
            f.email.focus();
            return false;
	}
//alert('envio');
        f.submit();
        return true;
}

function checkEmail() {
	var email = document.getElementById('email');
	var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/
	if (!filter.test(email.value)) {
		alert("");
		email.focus;
		return false;
		}
	return true;
}



function disableEnter(e){
 e = e || event;
 return (e.keyCode || event.which || event.charCode || 0) !== 13;
}