var NumberOfImages = 7;
var rolloverImages = new Array(NumberOfImages);
var normalImages = new Array(NumberOfImages);
var i;

for (i=1;i<8;i++) {
normalImages[i] = new Image(); 
normalImages[i].src = "images/button_0" + (i) + ".jpg";
}

for (i=1;i<8;i++) {
rolloverImages[i] = new Image(); 
rolloverImages[i].src = "images/buttonro_0" + (i) + ".jpg";
}


function Swap(imageID,imageFile) {
document.getElementById(imageID).src = eval(imageFile + ".src"); 
return true;
}