function validate(form) {
   
       if(document.emailForm.TO.value.indexOf("@")== -1 ) {
             alert("You must include a valid e-mail address in the To field");
       document.emailForm.TO.focus();
            return false;
            }
   
   
     if (document.emailForm.SENDER_NAME.value==""){
         alert("Your name is a required field");
       document.emailForm.SENDER_NAME.focus();
       return false;
       }
   
   
       if(document.emailForm.SENDER.value.indexOf("@")== -1 ) {
             alert("You must include a valid e-mail address in the Your e-mail address field");
            document.emailForm.SENDER.focus();
            return false;
            }
   
   
     return true;
     }