if (document.images) { 
img1on = new Image(); 
img1on.src = "images/room_on.gif"; 
img2on = new Image(); 
img2on.src = "images/rat_on.gif"; 
img3on = new Image(); 
img3on.src = "images/bea_on.gif"; 
img4on = new Image(); 
img4on.src = "images/abo2_on.gif"; 
img5on = new Image(); 
img5on.src = "images/find2_on.gif";
img6on = new Image(); 
img6on.src = "images/oth_on.gif";
img7on = new Image(); 
img7on.src = "images/posadas_on.gif";

img1off = new Image(); 
img1off.src = "images/room_off.gif"; 
img2off = new Image(); 
img2off.src = "images/rat_off.gif"; 
img3off = new Image(); 
img3off.src = "images/bea_off.gif"; 
img4off = new Image(); 
img4off.src = "images/abo2_off.gif"; 
img5off = new Image(); 
img5off.src = "images/find2_off.gif"; 
img6off = new Image(); 
img6off.src = "images/oth_off.gif"; 
img7off = new Image(); 
img7off.src = "images/posadas_of.gif"; 
}

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

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