function InitButtons() {
	        if (document.images) {
	                
	                dieOFF      = new Image();
	                dieOFF.src  = "pix/dienst.gif";
	                dieOVR      = new Image();
	                dieOVR.src  = "pix/dienst_h.gif";
	                
	                impOFF      = new Image();
	                impOFF.src  = "pix/impressionen.gif";
	                impOVR      = new Image();
	                impOVR.src  = "pix/impressionen_h.gif";
	                
	                unsOFF      = new Image();
	                unsOFF.src  = "pix/kunden.gif";
	                unsOVR      = new Image();
	                unsOVR.src  = "pix/kunden_h.gif";
					
					fishOFF      = new Image();
	                fishOFF.src  = "pix/fish.gif";
	                fishOVR      = new Image();
	                fishOVR.src  = "pix/fish_h.gif";
	                
	                konOFF      = new Image();
	                konOFF.src  = "pix/kontakt.gif";
	                konOVR      = new Image();
	                konOVR.src  = "pix/kontakt_h.gif";
					
					logoOFF      = new Image();
                    logoOFF.src  = "pix/do_logo.gif";
                    logoOVR      = new Image();
                    logoOVR.src  = "pix/do_logo_h.gif";
						
					clicked = "";
                }
        }
        
		 // Button mouse event handler.
		function BtnAct(imgBtn, sAction)
		{
		if (document.images) {
		        if (sAction == "CLK") {
		                if (clicked != "") {
		                        document[clicked].src = eval(clicked + "OFF.src");
		                }
		                clicked = imgBtn;
		                document[imgBtn].src = eval(imgBtn + "OVR.src");
		        } else if (clicked != imgBtn)
		                document[imgBtn].src = eval(imgBtn + sAction + ".src");
			} // BtnAct()
		}
		

		function navBarUnselect() {
			clicked = '';
			BtnAct('die', 'OFF');
			BtnAct('imp', 'OFF');
			BtnAct('uns', 'OFF');
			BtnAct('kon', 'OFF');
			BtnAct('logo', 'OFF');
		}
		
		function BtnClo(imgBtn, sAction) {
			if (document.images) {
				document[imgBtn].src = eval("clo" + sAction + ".src");
			}
		}
		
		function BtnInf(imgBtn, sAction) {
			if (document.images) {
				document[imgBtn].src = eval("inf" + sAction + ".src");
			}
		}