// browser detection
var dhtml = "";
var preload = 0;

browserName = navigator.appName; browserVer = parseInt(navigator.appVersion);
	if (browserName == "Netscape"
		&& browserVer >= 4) dhtml = "NS4";
	if (browserName == "Microsoft Internet Explorer"
		&& browserVer >= 4) dhtml = "MS4";
	if (browserName == "Netscape" && browserVer >= 3) preload = 1;
	if (dhtml == "NS4" || dhtml == "MS4") preload = 1;

// preload rollover images
if (preload) {
	overview_off = new Image(107,19);
	overview_off.src = "images/overview_off.gif";
	residentoff = new Image(67,12);
	residentoff.src = "images/residentoff.gif";
	homeoff = new Image(38,12);
	homeoff.src = "images/homeoff.gif";
	logonoff = new Image(48,12);
	logonoff.src = "images/logonoff.gif";
	industoff = new Image(67,12);
	industoff.src = "images/industoff.gif";
	property_mgmt_off = new Image(107,19);
	property_mgmt_off.src = "images/property_mgmt_off.gif";
	propmgmtservices_off = new Image(107,27);
	propmgmtservices_off.src = "images/propmgmtservices_off.gif";
	brokerage_off = new Image(107,27);
	brokerage_off.src = "images/brokerage_off.gif";
	propertylistings_off = new Image(107,19);
	propertylistings_off.src = "images/propertylistings_off.gif";

	overview_on = new Image(107,19);
	overview_on.src = "images/overview_on.gif";
	residenton = new Image(67,12);
	residenton.src = "images/residenton.gif";
	homeon = new Image(38,12);
	homeon.src = "images/homeon.gif";
	logonon = new Image(48,12);
	logonon.src = "images/logonon.gif";
	induston = new Image(67,12);
	induston.src = "images/induston.gif";
	property_mgmt_on = new Image(107,19);
	property_mgmt_on.src = "images/property_mgmt_on.gif";
	propmgmtservices_on = new Image(107,27);
	propmgmtservices_on.src = "images/propmgmtservices_on.gif";
	brokerage_on = new Image(107,27);
	brokerage_on.src = "images/brokerage_on.gif";
	propertylistings_on = new Image(107,19);
	propertylistings_on.src = "images/propertylistings_on.gif";
	
}

// function to change button image on rollover
function rollOver(imgDocName,imgObjName) {
	if (preload) {
		document [imgDocName].src = eval(imgObjName + ".src");
	}
}