var search_error_message='Please enter a valid 5 digit zip code, the name of a city, or select a state'

function search_okay()
{
var zip_text=document.getElementById("zip_text")
var city_text=document.getElementById("city_text")
var state_text=document.getElementById("state_text")

str=zip_text.value+city_text.value+state_text.value
if (str.length>0) 
  str=str.replace(/^\s+|\s+$/, '')
if (str.length == 0)
{
  alert(search_error_message)
  city_text.focus()
  return false
}
else
  return true
}