function resetLayers() 
	{

		uniform_layer.style.display = 'none' ;
		training_layer.style.display = 'none';
		marking_layer.style.display = 'none';
		casual_layer.style.display = 'none';
		leisure_layer.style.display = 'none';
		goods_layer.style.display = 'none';
		ddang_layer.style.display = 'none';
		changeImages('uniform','images/common/top2/uniform.gif') ; 
		changeImages('training','images/common/top2/training.gif') ; 
		changeImages('marking','images/common/top2/marking.gif') ; 
		changeImages('casual','images/common/top2/casual.gif') ; 
		changeImages('leisure','images/common/top2/leisure.gif') ; 
		changeImages('goods','images/common/top2/goods.gif') ; 
		changeImages('ddang','images/common/top2/ddang.gif') ; 
		
	}

	function changeLayers(overed,layer_id) 
	{
		resetLayers() ; 
		changeImages(overed,'images/common/top2/'+overed+'_on.gif') ; 
		layer_id.style.visibility = 'hidden' ;
		layer_id.style.display = 'block' ;
		fadeIn(layer_id,0.5) ;
		
	}



	function preloadImages() {

	  if (document.images) {

		marking_on = newImage("./images/common/top2/03marking_on.gif");
		uniform_on = newImage("images/common/top2/01uniform_on.gif");
		training_on = newImage("images/common/top2/02training_on.gif");
		casual_on = newImage("images/common/top2/04casual_on.gif");
		leisure_on = newImage("images/common/top2/05leisure_on.gif");
		goods_on = newImage("images/common/top2/06goods_on.gif");
		ddang_on = newImage("images/common/top2/07ddang_on.gif");
		preloadFlag = true ;


	  }
	}


	function fadeOut(layer_id,duration) {
		layer_id.style.filter="blendTrans(duration=0.5)";
		// make sure filter is not already playing
		if (layer_id.filters.blendTrans.status != 2) {
			layer_id.filters.blendTrans.apply();
			layer_id.style.visibility="hidden";
			layer_id.filters.blendTrans.play();
		} 
	}
	function fadeIn(layer_id,duration) {
		//layer_id.style.filter="blendTrans(duration=0.4)";
		layer_id.style.filter="blendTrans(duration="+duration+")";
		//layer_id.style.filter.blendTrans.duration=duration;
		// make sure filter is not already playing
		if (layer_id.filters.blendTrans.status != 2) {
			layer_id.filters.blendTrans.apply();
			layer_id.style.visibility="visible";
			layer_id.filters.blendTrans.play();
		} 
	}


	preloadImages();