function check_email(address) {
  if ((address == "")
    || (address.indexOf ('@') == -1)
    || (address.indexOf ('.') == -1))
      return false;
  return true;
}



function verifyproduct() {
if (document.addproduct.yourname.value == ""){
  alert("You must enter your name.")
  document.addproduct.yourname.focus() 
  return false } 


if (document.addproduct.youremail.value == "")  {
   alert("Please fill in your email address.")
   document.addproduct.youremail.focus() 
   return false }
else {
if (!check_email(document.addproduct.youremail.value)) {
    alert("Email address is incorrect. Please enter your email again.")
    document.addproduct.youremail.focus()
    return false } 
    }

if (document.addproduct.coname.value == "" && document.addproduct.contact.value == ""){
  alert("You must enter either a company name or a contact name.")
  document.addproduct.coname.focus() 
  return false } 
    
 if (document.addproduct.coemail.value == "")  {
   alert("Please fill in your email address.")
   document.addproduct.coemail.focus() 
   return false }
else {
if (!check_email(document.addproduct.coemail.value)) {
    alert("Email address is incorrect. Please enter your email again.")
    document.addproduct.coemail.focus()
    return false } 
    }
 
if (document.addproduct.prodname.value == "") {
  alert("Please fill in product name.")
  document.addproduct.prodname.focus() 
  return false } 

var prodOption = -1; 
for (i=0; i<addproduct.prodtype.length;i++) {
	if (addproduct.prodtype[i].checked){
		prodOption = i;
	}
}  
if (prodOption == -1){
  alert("Please select a product type.")
  document.addproduct.prodtype[0].focus()
  return false
}  

if (document.addproduct.summaryen.value == "" && document.addproduct.summaryfr.value == "") {
  alert("Please fill in a product summary either in English or in French.")
  document.addproduct.summaryen.focus() 
  return false } 

if (document.addproduct.proddescriptionen.value == "" && document.addproduct.proddescriptionfr.value == "") {
  alert("Please fill in product description either in English or in French.")
  document.addproduct.proddescriptionen.focus() 
  return false } 
  
}