aboutOn = new Image();
aboutOn.src = "on/about.gif";
aboutOff = new Image();
aboutOff.src = "off/about.gif";

listingsOn = new Image();
listingsOn.src = "on/listings.gif";
listingsOff = new Image();
listingsOff.src = "off/listings.gif";

calculatorOn = new Image();
calculatorOn.src = "on/calculator.gif";
calculatorOff = new Image();
calculatorOff.src = "off/calculator.gif";

inquiryOn = new Image();
inquiryOn.src = "on/inquiry.gif";
inquiryOff = new Image();
inquiryOff.src = "off/inquiry.gif";

function imgOn(imgName) {
	document [imgName].src = eval((imgName) + "On.src");
}
function imgOff(imgName) {
	document [imgName].src = "off/" + (imgName) + ".gif";
}
function calculator() {
	calculatorWindow = window.open ("calculator.asp","calculator","toolbar=no,width=450,height=350,directories=no,status=no,scrollbars=yes,resize=no,menubar=no")
	calculatorWindow.focus()
}