function validate() {
    if (document.enquiryform.clientname.value.length < 1) {
        alert("Please enter your name.");
        return false;
    }
	if (document.enquiryform.clientname.value.length > 100) {
        alert("Sorry your name is too long - 100 characters maximum.");
        return false;
	}
   
    if (document.enquiryform.telno.value.length > 60) {
       alert("Sorry the telephone number is too long - 60 characters maximum.");
       return false;
   }
    if (document.enquiryform.emailaddress.value.length < 8) {
       alert("Please enter your email address.");
       return false;
   }
    if (document.enquiryform.emailaddress.value.length > 60) {
       alert("Sorry your email address is too long - 60 characters maximum.");
       return false;
   }
    if (document.enquiryform.comments.value.length > 500) {
       alert("Sorry your comments are too long - 500 characters maximum..");
       return false;
    } 
   return true;
}