function valider_formulaire(thisForm)
{       
   	  
    if (thisForm.email.value.indexOf('@')<3 || thisForm.email.value.indexOf('.')<5)
    {
         alert('Please make sure that the email address is correct');
         thisForm.email.focus();
         return false;
    }
    if(thisForm.email.value == '')
    {
         alert('Type your email address to subscribe');
         thisForm.email.focus();
         return false;
    }
	    
    return true;
}