if (document.images) 
{ 

if (document.image = "pic1")
{
   pic1on= new Image(200,50); 
   pic1on.src="images/button_home_on.png"; 
   pic1off= new Image(200,50); 
   pic1off.src="images/button_home_off.png"; 
   pic1down=new Image(200,50); 
   pic1down.src="images/button_home_on.png";
}

if (document.image = "pic2")
{
   pic2on= new Image(200,100); 
   pic2on.src="images/button_res_on.png"; 
   pic2off= new Image(200,100); 
   pic2off.src="images/button_res_off.png"; 
   pic2down=new Image(200,100); 
   pic2down.src="images/button_res_on.png";
}

if (document.image = "pic3")
{
   pic3on= new Image(442,333); 
   pic3on.src="images/button_rates_on.png"; 
   pic3off= new Image(442,333); 
   pic3off.src="images/button_rates_off.png"; 
   pic3down=new Image(442,333); 
   pic3down.src="images/button_rates_on.png";
}

if (document.image = "pic4")
{
   pic4on= new Image(442,333); 
   pic4on.src="images/button_checkin_on.png"; 
   pic4off= new Image(442,333); 
   pic4off.src="images/button_checkin_off.png"; 
   pic4down=new Image(442,333); 
   pic4down.src="images/button_checkin_on.png";
}
if (document.image = "pic5")
{
   pic5on= new Image(880,334); 
   pic5on.src="images/button_pay_on.png"; 
   pic5off= new Image(880,334); 
   pic5off.src="images/button_pay_off.png"; 
   pic5down=new Image(880,334); 
   pic5down.src="images/button_pay_on.png";
}

if (document.image = "pic6")
{
   pic6on= new Image(880,334); 
   pic6on.src="images/button_gallery_on.png"; 
   pic6off= new Image(880,334); 
   pic6off.src="images/button_gallery_off.png"; 
   pic6down=new Image(880,334); 
   pic6down.src="images/button_gallery_on.png";
}

if (document.image = "pic7")
{
   pic7on= new Image(880,333); 
   pic7on.src="images/button_friends_on.png"; 
   pic7off= new Image(880,333); 
   pic7off.src="images/button_friends_off.png"; 
   pic7down=new Image(880,333); 
   pic7down.src="images/button_friends_on.png";
}

 
} 
function lightup(imgName) 
{ 
if (document.images) 
{ 
imgOn=eval(imgName + "on.src"); 
document[imgName].src= imgOn; 
} 
} 

function turnoff(imgName) 
{ 
if (document.images) 
{ 
imgOff=eval(imgName + "off.src"); 
document[imgName].src= imgOff; 
} 
} 

function clickdown(imgName) 
{ 
if (document.images) 
{ 
imgDown=eval(imgName + "down.src"); 
document[imgName].src= imgDown; 

} 
}