function derecho(){
	  return false;
}
document.oncontextmenu = derecho;

function tecla(e){
	if(window.event) // IE
	  keynum = e.keyCode;
	else if(e.which) // Netscape/Firefox/Opera
	  keynum = e.which;
	if (keynum == 13)
		buscar();
}

function buscar(termino){
	termino = (document.getElementById("termino")).value;
	document.location.href = "./index.php?termino=" + termino;
}

function sugerir(){
	document.location.href = "./sugerir.php";
}

function validarMail(emailStr){
	var s = emailStr;
	var filter=/^[A-Za-z][A-Za-z0-9_.]*@[A-Za-z0-9_]+\.[A-Za-z0-9_.]+[A-za-z]$/;
	if (filter.test(s)) return true;
	else{
		alert("Por favor, revise su email.");
		document.contacto.email.focus();
		return false;
	}
}

function validarURL(url){
	if (url == "")
		return true;
	else
		url = "http://" + url;
	if (/^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)( [a-zA-Z0-9\-\.\?\,\’\/\\\+&%\$#_]*)?$/.test(url))
		return true;
	else{
		alert("Por favor, revise la url de su web.");
		return false;
	}
}