<!--
var buttons;
var buttonsPreloaded = false;

function preloadButtons() {
	if (!document.images ) { return; }

	buttons = new Array();

	/* Top Navigation */
	buttons["mainlink01"] = new Object();
	buttons["mainlink01"].normal = new Image(47, 13);
	buttons["mainlink01"].normal.src = "images/header_hd_3ccd_off.gif";
	buttons["mainlink01"].hover = new Image(47, 13);
	buttons["mainlink01"].hover.src = "images/header_hd_3ccd_on.gif";

	buttons["mainlink02"] = new Object();
	buttons["mainlink02"].normal = new Image(50, 13);
	buttons["mainlink02"].normal.src = "images/header_hd_cmos_off.gif";
	buttons["mainlink02"].hover = new Image(50, 13);
	buttons["mainlink02"].hover.src = "images/header_hd_cmos_on.gif";
	
	/* all done */
	buttonsPreloaded = true;
	return;
}

function switchButton(buttonName, buttonState) {
	if (!document.images) { return; }
	if (!buttonsPreloaded) { return; }
	if (!buttonName || buttonName == "") { return; }
	if (!buttonState || buttonState == "") { return; }

	if (document.getElementById) {
		var target = document.getElementById(buttonName);
	} else if (document.all) {
		var target = document.all(buttonName);
	} else if (document.layers) {
		var target = document.images[buttonName];
	}

	if (target) {
		target.src = eval("buttons['" + buttonName + "']." + buttonState + ".src");
	}

	return;
}
//-->