function changeLayernara(iSelLyr, iSubLyr){		
		
		var oLyr				= null;
		var oSubLyr		= null;
		var oImgPlus		= null;
		var oImgMinus	= null;
		
		oLyr = document.all['Layer_' + iSelLyr];		
		if(!oLyr) return false;

		oImgPlus		= document.all['Image' + iSelLyr];
		oImgMinus		= document.all['Image' + iSelLyr + '_open'];

		if(!oImgPlus || !oImgMinus) return false;
		oImgPlus.src = oImgMinus.innerHTML;
		
		oSubLyr = document.all['SubLyr_' + iSelLyr];
		if(!oSubLyr) return false;
		
		if(oSubLyr.style.display == 'none') oSubLyr.style.display = '';

		if(iSubLyr != ''){
			var oSubItem = null;

			oSubItem = document.all['sub' + iSelLyr + '_' + iSubLyr];
			if(!oSubItem) return false;
				
			oSubItem.style.color = '#E96030';
			oSubItem.style.fontWeight = 'bold';	
		}
		return true;
	}