function presignupform () {
  var frm = document.getElementById('signupform');
  if (frm.first_name.value == ""){
	  window.alert("Please fill in your first name");
  } else if (frm.last_name.value == ""){
	  window.alert("Please fill in your last name");
  } else if (frm.email.value == ""){
	  window.alert("Please fill in your email address.");
  } else if (!isvalidemail(frm.email.value)){
	  window.alert("Please enter a valid email address.");
  } else if (frm.email.value != frm.email2.value){
	  window.alert("Email address mismatch.");
  } else if (frm.phone.value == ""){
	  window.alert("Please fill in your phone number.");
  } else if (frm.company.value == ""){
	  window.alert("Please fill in your company name.");
  } else if (frm.URL.value == ""){
	  window.alert("Please fill in your company website URL.");
  } else if (!frm.Terms_Of_Service.checked){
	  window.alert("You must agree to the terms of service.");
  } else {
	  frm.submit();
  }
  return false;
}