function CheckNews()
{
  var err=0;
  reg_ex=/^\w[\w|\.|-]+@\w[\w|\.|-]+\.[a-zA-Z]{2,4}$/;
  if (document.box.email.value=='' || document.box.email.value=='Your e-mail') {
    err='Please enter your email address.';
  }else{
    if (reg_ex.test(document.box.email.value)==false){
      err='Your email address seems to have an invalid format.';
    }
  }
  if (err==0) {
    return true;
  } else {
    alert(err);
    return false;
  }
}
function toggleHelp (topic) {
  if (document.getElementById)
    if (document.getElementById(topic).style.visibility != "visible") 
      document.getElementById(topic).style.visibility = "visible"; 
	else
	  document.getElementById(topic).style.visibility = "hidden";
}