function enviarmail () {
//var username = "info";
//var hostname = "nodular-soft.com";
//var linktext = username+"@"+hostname;
//document.write("<a href='" + "mail" + "to:" + username +"@" + hostname + "' ><img src='img/logo_ns_pla.gif' alt='logo Nodular Soft' width='24' height='12' /></a>");
document.write("<a href='contact-form.php' ><img src='img/logo_ns_pla.gif' alt='logo Nodular Soft' width='24' height='12' /></a>");
};

function validate (form) {
	if (!form.nombre.value) {
	  alert("insert a name");
	  return false;	
	} 
	if (!form.email.value) {
	  alert("insert an email");
	  return false;
	} 
	if (((form.email.value.indexOf(".") > 2) && (form.email.value.indexOf("@") > 0))==false) {
	  alert("insert a valid email");
	  return false;	  	
	}
	if (!form.mensaje.value) {
	  alert ("insert a message");
	  return false;	
	}
    return true;
}