function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}

function validateForm(thisform)
{
with (thisform)
{

if (validate_required(clientname,"Your name must be specified!")==false) {
   clientname.focus(); return false;
}

if (validate_required(clientaddress,"Your address must be specified!")==false) {
   clientaddress.focus(); return false;
}

if (validate_required(clientphone,"Your phone number must be specified!")==false) {
   clientphone.focus(); return false;
}

if (validate_required(email,"Your e-mail address must be specified!")==false) {
   email.focus(); return false;
}

if (validate_required(jobdesc,"The job description must be specified!")==false) {
   jobdesc.focus(); return false;
}

}

return true;
}