if (document.images) {
	btn_01_on = new Image();  btn_01_on.src = "/_images/button/neuwagen_off.gif";
	btn_01_off = new Image();  btn_01_off.src = "/_images/button/neuwagen_on.gif";
	btn_02_on = new Image();  btn_02_on.src = "/_images/button/gebrauchtwagen_off.gif";
	btn_02_off = new Image();  btn_02_off.src = "/_images/button/gebrauchtwagen_on.gif";
	btn_03_on = new Image();  btn_03_on.src = "/_images/button/service_off.gif";
	btn_03_off = new Image();  btn_03_off.src = "/_images/button/service_on.gif";
	
	btn_rev_01_on = new Image();  btn_rev_01_on.src = "/_images/button/neuwagen_on.gif";
	btn_rev_01_off = new Image();  btn_rev_01_off.src = "/_images/button/neuwagen_off.gif";
	btn_rev_02_on = new Image();  btn_rev_02_on.src = "/_images/button/gebrauchtwagen_on.gif";
	btn_rev_02_off = new Image();  btn_rev_02_off.src = "/_images/button/gebrauchtwagen_off.gif";
	btn_rev_03_on = new Image();  btn_rev_03_on.src = "/_images/button/service_on.gif";
	btn_rev_03_off = new Image();  btn_rev_03_off.src = "/_images/button/service_off.gif";
	}

function imgOn(imgName) {
        if (document.images) {
        document[imgName].src = eval(imgName + "_on.src");
								}
						}

function imgOff(imgName) {
        if (document.images) {
        document[imgName].src = eval(imgName + "_off.src");
								}
						}