function Formm(optout) {
if(optout.prod_name.value=="" && optout.prod_code.value=="" && optout.model_descr.value=="") {
alert("Please enter a Product Name, Product Code or Model to enquire about.")
optout.prod_name.focus()
return false
}
if(optout.full_name.value=="") {
alert("Please enter your Full Name")
optout.full_name.focus()
return false
}
if(optout.email_address.value=="") {
alert("Please enter your Email Address")
optout.email_address.focus()
return false
}
var mail=optout.email_address.value
var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
var returnval=emailfilter.test(mail)
if (returnval==false){
alert("Please enter a valid Email Address")
optout.email_address.focus() 
return false
}
return true
}