var browserType;

if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {
 browserType= "gecko"
}

function hide(whichelement) {
  if (browserType == "gecko" )
     document.poppedLayer =
         eval('document.getElementById(whichelement)');
  else if (browserType == "ie")
     document.poppedLayer =
        eval('document.getElementById(whichelement)');
  else
     document.poppedLayer =
        eval('document.layers[whichelement]');
  document.poppedLayer.style.display = "none";
}

function show(whichelement) {
  if (browserType == "gecko" )
     document.poppedLayer =
         eval('document.getElementById(whichelement)');
  else if (browserType == "ie")
     document.poppedLayer =
        eval('document.getElementById(whichelement)');
  else
     document.poppedLayer =
         eval('document.layers[whichelement]');
  document.poppedLayer.style.display = "inline";
}

function formHandler(){
	if (document.theform.searchBy[document.theform.searchBy.selectedIndex].value=="city"){
		hide("dd2");
		show("dd1");
	}else{
		show("dd2");
		hide("dd1");
	}
}