var preloadButtonsFlag = false;
    function setup(){
//    	preloadButtons();
//	alert('setup complete')
    }
    
    function preloadButtons()
    {
	button_news_off = new Image("image\button_news_off.gif")
	button_portrait_4tune_off = new Image("image\button_portrait_4tune_off.gif")
	button_portrait_birgit_off = new Image("image\button_portrait_birgit_off.gif")
	button_portrait_angelika_off = new Image("image\button_portrait_angelika_off.gif")
	button_portrait_benjamin_off = new Image("image\button_portrait_benjamin_off.gif")
	button_portrait_ralph_off = new Image("image\button_portrait_ralph_off.gif")
	button_presse_off = new Image("image\button_presse_off.gif")
	button_medien_off = new Image("image\button_medien_off.gif")
	button_impressum_off = new Image("image\button_impressum_off.gif")
	button_gaeste_off = new Image("image\button_gaeste_off.gif")
	button_news_on = new Image("image\button_news_on.gif")
	button_portrait_4tune_on = new Image("image\button_portrait_4tune_on.gif")
	button_portrait_birgit_on = new Image("image\button_portrait_birgit_on.gif")
	button_portrait_angelika_on = new Image("image\button_portrait_angelika_on.gif")
	button_portrait_benjamin_on = new Image("image\button_portrait_benjamin_on.gif")
	button_portrait_ralph_on = new Image("image\button_portrait_ralph_on.gif")
	button_presse_on = new Image("image\button_presse_on.gif")
	button_medien_on = new Image("image\button_medien_on.gif")
	button_impressum_on = new Image("image\button_impressum_on.gif")
	button_gaeste_on = new Image("image\button_gaeste_on.gif")
   	preloadButtonsFlag = true;
    }
	function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}

	function getMatchingObject(objectStr)
	{
		var object;
		if (preloadButtonsFlag == true)
		{
			alert ('1')
			object = document.all[objectStr]
			alert ('2')
			if (object==null) 
			{
			alert ('3')
				object=document.getElementById(objectStr);
			alert ('4')
				if (object==null) 
				{
					alert ('cannot find object matching string ' + objectStr)
				}
			}
		} else {alert ('buttons are not preloaded, cannot find images ')}
		alert ('returning object ' + object)
		return object;
	}
    function lightOn(button) {
//		var buttonLightOnStr = button + '_on';
//		var buttonLightOn = getMatchingObject(buttonLightOnStr);
//		buttonLightOn = document.images[button_portrait_off];
//		document.images[button].src = button_portrait_on.src;
		var buttonLightOnSrc = 'images/' + button + '_on.gif';
		document.images[button].src = buttonLightOnSrc;
}
    function lightOff(button) {
		var buttonLightOffSrc = 'images/' + button + '_off.gif';
		document.images[button].src = buttonLightOffSrc;
}
    function lightOnScheren(name) {
		var scherenLightOnSrc = 'images/scheren-schwarz-' + name + '.png';
		document.images['scheren'].src = scherenLightOnSrc;
}
    function lightOffScheren(name) {
		var scherenLightOffSrc = 'images/scheren-schwarz.png';
		document.images['scheren'].src = scherenLightOffSrc;
}