function validar_form(){

	var reg_nombre = $('reg_nombre');
	var reg_apellido = $('reg_apellido');
	var reg_email = $('reg_email');
	var reg_empresa = $('reg_empresa');
	var reg_cargo = $('reg_cargo');
	var reg_telefono = $('reg_telefono');
	var reg_direccion = $('reg_direccion');
	var reg_ciudad = $('reg_ciudad');
	var reg_cp = $('reg_cp');
	var reg_provincia = $('reg_provincia');
	var reg_anio = $('reg_anio');


	if (reg_apellido.value.length<1) {
		alert("You must enter a First Name");
		reg_apellido.focus();
		return false;
	} else if (reg_nombre.value.length<1) {
		alert("You must enter a Last Name");
		reg_nombre.focus();
		return false;
	} else if (reg_email.value.length<1 || echeck(reg_email.value)==false) {
		alert("You must enter a valid e-mail");
		reg_email.focus();
		return false;
	} else if (reg_empresa.value.length<1) {
		alert("You must enter a Company");
		reg_empresa.focus();
		return false;
	} else if (reg_cargo.value.length<1) {
		alert("You must enter a Title / Position");
		reg_cargo.focus();
		return false;
	} else if (reg_anio.value.length<1) {
		alert("You must enter a Date of Birth");
		reg_anio.focus();
		return false;
	} else if (reg_telefono.value.length<1) {
		alert("You must enter a Telephone");
		reg_telefono.focus();
		return false;
	} else if (reg_direccion.value.length<1) {
		alert("You must enter an Address");
		reg_direccion.focus();
		return false;
	} else if (reg_ciudad.value.length<1) {
		alert("You must enter a City");
		reg_ciudad.focus();
		return false;
	} else if (reg_cp.value.length<1) {
		alert("You must enter a Zip Code");
		reg_cp.focus();
		return false;
	} else if (reg_provincia.value.length<1) {
		alert("You must enter a Province / State");
		reg_provincia.focus();
		return false;

	} else {
		return true;
	};
 }
$('formRegistracion').onsubmit = validar_form;

function echeck(str) {
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);

	if ((str.indexOf(at)==-1) ||
	((str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)) ||
	((str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)) ||
	(str.indexOf(at,(lat+1))!=-1) ||
	((str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)) ||
	(str.indexOf(dot,(lat+2))==-1) ||
	(str.indexOf(" ")!=-1)) {
		return false;
	} else {
		return true;
	};
}