<!--
function blockError(){return true;}
window.onerror = blockError;

function ValidateForm(contact_form)
{

  if (contact_form.Name.value == "")
  {
    alert("Please enter a value for the \"Name\" field.");
    theForm.Name.focus();
    return (false);
  }

  if (contact_form.typeofcustomer.selectedIndex < 0)
  {
    alert("Please select one of the \"typeofcustomer\" options.");
    theForm.typeofcustomer.focus();
    return (false);
  }
  return (true);
  
}

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!--  Begin
function resetform() {
document.forms[0].elements[1]=="";
}
function submitForms() {
if (isEmail() && isFname() && isLname() && isAddress() && isCity() && isState() && isZip())
if (confirm("\n You are about to e-mail your submission. \n\nYES to submit.    NO to abort."))
{
alert("\nYour submission will now be sent. \n\n Use the Return Button once the submission is complete to return to my home page.\n\n\n Thank you for joining our mailing list!");
return true;
}
else
{
alert("\n You have chosen to abort the submission.");
return false
}
else 
return false;
}
function isEmail() {
if (document.forms[0].elements[1].value == "") {
alert ("\n The E-Mail field is blank. \n\n Please enter your E-Mail address.")
document.forms[0].elements[1].focus();
return false;
}
if (document.forms[0].elements[1].value.indexOf ('@',0) == -1 ||
document.forms[0].elements[1].value.indexOf ('.',0) == -1) {
alert ("\n The E-Mail field requires a \"@\" and a \".\"be used. \n\nPlease re-enter your E-Mail address.")
document.forms[0].elements[1].select();
document.forms[0].elements[1].focus();
return false;
}
return true;
}

// End -->
// -->