var count = 0;

function preLoad() {

enhance = new Image();
enhance.onload = loadCheck;
enhance.src = "images/button-enhance-on.gif";

promote = new Image();
promote.onload = loadCheck;
promote.src = "images/button-promote-on.gif";

contact = new Image();
contact.onload = loadCheck;
contact.src = "images/button-contact-on.gif";
}


if (document.images) { 

image1on = new Image();
image1on.src = "images/button-home-on.gif";

image1off = new Image();
image1off.src = "images/button-home.gif";

image2on = new Image();
image2on.src = "images/button-enhance-on.gif";

image2off = new Image();
image2off.src = "images/button-enhance.gif";

image3on = new Image();
image3on.src = "images/button-promote-on.gif";

image3off = new Image();
image3off.src = "images/button-promote.gif";

image4on = new Image();
image4on.src = "images/button-contact-on.gif";

image4off = new Image();
image4off.src = "images/button-contact.gif";
}

function changeImages() {

if (document.images) { 
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
}
}
}