function ventanaSecundaria (URL){ 
   window.open(URL,"ventana1","width=490,height=355,scrollbars=NO"); 
} 

function ventanaSecundariaterms (URL){ 
   window.open(URL,"ventana2","width=650,height=600,scrollbars=YES"); 
} 

function IsMail(YourMail)
{
	var Template = /^[a-z][a-z-_0-9.]+@[a-z-_=>0-9.]+.[a-z]{2,3}$/i //Formato de direccion de correo electronico
	
	if(YourMail.value!="") 
	{
		if (Template.test(YourMail.value)) 
		{							}
		else
		{   alert("The email that has entered has invalid characteres");
			YourMail.focus();
			YourMail.select();
		}		
	}
	return false;
}