var sZip = "" ;
//var sMiles = "200" ;
//var sSearchType = "" ;
var sCity = "" ;

function CheckForm(sSearchType)
{
  var s = new String;

  sZip = document.frmZipCode.txtZip.value ;
  
  sCity = document.frmZipCode.txtCity.value ;

  if (sZip == "" && sCity == "")
  {
    alert("Sorry! Please enter a Zip Code or City.") ;
    document.frmZipCode.txtZip.focus ;
	  return ;
  }

  if ( sZip != "")
  {
    //s = "WelcomePickShelter.asp?ZIP=" + sZip.substring(0,5) ;
    if (sSearchType != "LOST") 
      s = "pick_shelter.asp?frontdoor=1&ZIP=" + sZip.substring(0,5) ;
    else
      s = "LostPet.asp?frontdoor=1&ZIP=" + sZip.substring(0,5) ;  
  }  
  else
    s = "CitySearch.asp?frontdoor=1&city=" + escape(sCity) ;  

  parent.FRAME_CONTENT.location = s + "&searchtype=" + sSearchType + "&MILES=200&stylesheet=include/default.css" ;
  
  if (sSearchType == "LOST") 
    parent.FRAME_TOPNAV.location = "blank.htm" ;
    
} // end function