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

function validate_search(f)
{
  with (f) {
    if (validate_required(txtSearch,"Please Enter a Search Term") == false) {
      txtSearch.focus()
      return false
    }
  }
}