if(document.images)
{

  var category;
  
  reale_on = new Image ( );
  reale_out = new Image ( );

  reale_on.src = "images/reale_on.gif";
  reale_out.src = "images/reale_out.gif";

  medical_on = new Image ( );
  medical_out = new Image ( );

  medical_on.src = "images/medical_on.gif";
  medical_out.src = "images/medical_out.gif";  

  nightlife_on = new Image ( );
  nightlife_out = new Image ( );

  nightlife_on.src = "images/nightlife_on.gif";
  nightlife_out.src = "images/nightlife_out.gif";   

  retail_on = new Image ( );
  retail_out = new Image ( );

  retail_on.src = "images/retail_on.gif";
  retail_out.src = "images/retail_out.gif"; 

  restaurant_on = new Image ( );
  restaurant_out = new Image ( );

  restaurant_on.src = "images/restaurant_on.gif";
  restaurant_out.src = "images/restaurant_out.gif"; 
  
  other_on = new Image ( );
  other_out = new Image ( );

  other_on.src = "images/other_on.gif";
  other_out.src = "images/other_out.gif";
}
function buttoff(){
document.getElementById('reale').src = reale_out.src;
document.getElementById('retail').src = retail_out.src;
document.getElementById('restaurant').src = restaurant_out.src;
document.getElementById('nightlife').src = nightlife_out.src;
document.getElementById('medical').src = medical_out.src;
document.getElementById('other').src = other_out.src;
}

function button_on ( imgId )
{
  if ( document.images )
  {
    butOn = eval ( imgId + "_on.src" );
    document.getElementById(imgId).src = butOn;
  }
}

function button_off ( imgId )
{
  if ( document.images )
  {
    butOff = eval ( imgId + "_out.src" );
    document.getElementById(imgId).src = butOff;
  }
}

function displaysub() {
document.getElementById('subcat_restnt').style.visibility = 'hidden';
document.getElementById('subcat_reale').style.visibility = 'hidden';
document.getElementById('subcat_nightlife').style.visibility = 'hidden';
document.getElementById('subcat_medical').style.visibility = 'hidden';
document.getElementById('subcat_retail').style.visibility = 'hidden';

switch(category)
{
case 'restaurant':
  var vis = document.getElementById('subcat_restnt').style.visibility;
	if(vis =='visible'){
		document.getElementById('subcat_restnt').style.visibility='hidden';
	} else {
		document.getElementById('subcat_restnt').style.visibility='visible';
	}
  break;
  
case 'reale':
 var vis = document.getElementById('subcat_reale').style.visibility;
	if(vis =='visible'){
		document.getElementById('subcat_reale').style.visibility='hidden';
	} else {
		document.getElementById('subcat_reale').style.visibility='visible';
	}
  break;

case 'nightlife':
 var vis = document.getElementById('subcat_nightlife').style.visibility;
	if(vis =='visible'){
		document.getElementById('subcat_nightlife').style.visibility='hidden';
	} else {
		document.getElementById('subcat_nightlife').style.visibility='visible';
	}
  break;
  
case 'medical':
 var vis = document.getElementById('subcat_medical').style.visibility;
	if(vis =='visible'){
		document.getElementById('subcat_medical').style.visibility='hidden';
	} else {
		document.getElementById('subcat_medical').style.visibility='visible';
	}
  break;

case 'retail':
 var vis = document.getElementById('subcat_retail').style.visibility;
	if(vis =='visible'){
		document.getElementById('subcat_retail').style.visibility='hidden';
	} else {
		document.getElementById('subcat_retail').style.visibility='visible';
	}
  break;
  
}
}

function submitform()
{
  document.inputdata.submit();
}