function validate (formName){

  // Make sure they select at least one solution
  var solempty = 0;
  for (var i=0; i<=13; i++){
    if (formName.elements.solution[i].checked == false){
      solempty++;
    }
  }
  if (solempty == 8){
    alert("Please select a solution");
    //formName.elements.solution.focus();
    return false;
  }
  
  // make sure they put their first name in
  if (formName.elements.firstname.value == ""){
    alert ("Please enter your First Name");
    formName.elements.firstname.focus();
    return false;
  }
  
  // make sure first name is more than 3 characters long
  if (formName.elements.firstname.value.length < 3){
    alert("Please enter at least 3 characters in the First Name field.");
    formName.elements.firstname.focus();
    return false;
  }
  
  // Check for valid characters in the first name
  var checkStr = formName.elements.firstname.value;
  var regEx = /^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz \t\r\n\f]*$/;
  if (!checkStr.match(regEx)){
    alert("Please enter only letters, spaces and . - / ( ) \\ characters in the First Name field.");
    return false;
  }
  
  // make sure they put their last name in
  if (formName.elements.lastname.value == ""){
    alert ("Please enter your Last Name");
    formName.elements.lastname.focus();
    return false;
  }
  
  // make sure last name is more than 3 characters long
  if (formName.elements.lastname.value.length < 3){
    alert("Please enter at least 3 characters in the Last Name field.");
    formName.elements.lastname.focus();
    return false;
  }
  
  // Check for valid characters in the last name
  var checkStr = formName.elements.lastname.value;
  var regEx = /^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz \t\r\n\f]*$/;
  if (!checkStr.match(regEx)){
    alert("Please enter only letters, spaces and . - / ( ) \\ characters in the Last Name field.");
    return false;
  }
  
  // validate telephone field
  if (formName.elements.telephone.value == ""){
    alert ("Please enter your Telephone number");
    formName.elements.telephone.focus();
    return false;
  }
  
  if (formName.elements.telephone.value != ""){
    // Check for valid characters in the phone number
    checkStr = formName.elements.telephone.value;
    if (!checkStr.match(/^[0123456789 --()]*$/)){
      alert("Please enter only numbers, spaces and - ( ) characters in the Telephone number field.");
      return false;
    }
  
    // make sure they give a long enough number (7 characters)
    if (formName.elements.telephone.value.length < 7){
      alert("Your Phone Number must have at least 7 digits");
      formName.elements.telephone.focus();
      return false;
    }
  }
  
  // validate country field
  if (formName.elements.country.value == ""){
    alert ("Please enter your country");
    formName.elements.country.focus();
    return false;
  }
  
  // validate email
  if (formName.elements.email.value == "") {
    alert ("Please enter your e-mail address");
    formName.elements.email.focus();
    return false;
  }
  
  // Check for valid email
  checkStr = formName.elements.email.value;
  if (!checkStr.match(/^[A-Za-z0-9_\-\.]+@([A-Za-z0-9-]+\.)+[A-Za-z]{2,}$/)){
    alert("Please enter a valid e-mail address.\n\n\If you are downloading, a password to open the evaluation software will be e-mailed to you.");
    return false;
  }
  
  // now make sure that they have entered their e-mail address twice
  if (formName.elements.email2.value == "") {
    alert ("Please verify your e-mail address");
    formName.elements.email2.focus();
    return false;
  }
  
  // now make sure that they have entered their e-mail address correctly
  if (formName.elements.email2.value != formName.elements.email.value) {
    alert ("The e-mail addresses you have entered do not match. Please ensure they are correct.");
    formName.elements.email2.focus();
    return false;
  }
  
  // Everything is OK, so submit the form.
  return true;
  //return false; //falsed for testing
  
}


/* This function takes the name of the download and redirects to the
   download file URL to download the appropriate kit */
function downloadNow(product){
  if (product == "pderemotecontrol"){
    var language = document.pdrLang.elements.pdrLangChoices.value;
  }
	
  else if (product == "pdeconsole"){
    var language = document.pdeLang.elements.pdeLangChoices.value;
  }
	
  else {
    language = "en";
  }
  
  window.location = "http://www.vector-networks.com/download/dload.php?get="+ product +"_"+ language;
}

/* This function ensures that the file size and product version are
	always correct when	the user changes the language select box */
function changeLang(product){
  var mods = "";
  var modinv = mods.indexOf("Inventory");
	var moddis = mods.indexOf("Distribution");
	var modmet = mods.indexOf("Metering");
  
  if (product == "pde"){
    if (document.pdelang.elements.choices.value == "en"){
      document.all.pdeFileSize.innerText = "155.1";
			document.all.pdever.innerText = "5.00";
			
      if (modinv != -1){ document.all.invver.innerText = "4.01"; }
			if (moddis != -1){ document.all.disver.innerText = "4.01"; }
			if (modmet != -1){ document.all.metver.innerText = "4.01"; }
      
    } else {
      document.all.pdeFileSize.innerText = "100";
			document.all.pdever.innerText = "4.01";
			
      if (modinv != -1){ document.all.invver.innerText = "4.01"; }
			if (moddis != -1){ document.all.disver.innerText = "4.01"; }
			if (modmet != -1){ document.all.metver.innerText = "4.01"; }
      
    }
  } else if (product == "pder"){
    if (document.pdrlang.elements.choices.value == "en"){
      document.all.pdrFileSize.innerText = "16.8";
      document.all.pdrVersion.innerText = "9.5";
    } else {
      document.all.pdrFileSize.innerText = "38.9";
      document.all.pdrVersion.innerText = "9.1";
    }
    
  } else if (product == "pdrc"){
    if (document.pdrlang.elements.choices.value == "en"){
      document.all.pdrFileSize.innerText = "16.8";
      document.all.pdrVersion.innerText = "9.50";
      
    } else if (document.pdrlang.elements.choices.value == "jp"){
      document.all.pdrFileSize.innerText = "16.8";
      document.all.pdrVersion.innerText = "9.00";
      
    } else {
      document.all.pdrFileSize.innerText = "38.9";
      document.all.pdrVersion.innerText = "9.10";
    }
  }
}