function responder_validation()
{

            var rspform = document.getElementById("rspform");

            var listitems= rspform.getElementsByTagName("input");

            for (a=0;a<listitems.length;a++)

            { switch (listitems[a].name)

              {



                        case 'fields[subscribers_email]':            var reEmail = /^[-\w\d\.]+@[-\w\d\.]+\.[-\w\d\.]+$/;

if(listitems[a].value == "")
    {   alert("Please enter your e-mail address");listitems[a].focus();return false;}
    if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(listitems[a].value)))
    {   alert("Please enter valid e-mail address");listitems[a].focus();return false;}
	break;

              }

            }

}