//Define global variables
       
        var layerNumShowing=1;
		var layerTNumShowing=1;
		
        function init(){
          if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) {
                    layerStyleRef="layer.";
                        layerRef="document.layers[";
                        styleSwitch="]";
                        }
		  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )){
                        layerStyleRef="layer.style.";
                        layerRef="document.all[";
                        styleSwitch="].style";
                        }   
			if ((navigator.appName == "Netscape")  && (parseInt(navigator.appVersion) >= 5)){
						layerStyleRef="layer.style.";
						layerRef="document.getElementById(";   
						styleSwitch=").style";
																		
}}

init()

	// layers show and hide
        function showLayerNumber(number){
                var layerNumToShow=number;
                hideLayer(eval('"layer' + layerNumShowing+'"'));
				document["dot"+ layerNumShowing].src = eval("dotoff.src");
                showLayer(eval('"layer' + layerNumToShow+'"'));
				document["dot"+ layerNumToShow].src = eval("doton.src");
                layerNumShowing=layerNumToShow;         }
				
	//	 function showTextNumber(number){
		 
      //          var layerTNumToShow=number;
      //          hideLayer(eval('"layertext' + layerTNumShowing+'"'));
       //         showLayer(eval('"layertext' + layerTNumToShow+'"'));
        //        layerTNumShowing=layerTNumToShow;         }
                
        
        function showLayer(layerName){
                eval(layerRef+'"'+layerName+'"'+styleSwitch+'.visibility="visible"');         
	
}       

        function hideLayer(layerName){
                eval(layerRef+'"'+layerName+'"'+styleSwitch+'.visibility="hidden"');  
} 
             
        function showPreviousLayer(a){
                var layerNumToShow=layerNumShowing-1;
                if (layerNumToShow < 1){layerNumToShow=a;}
                hideLayer(eval('"layer' + layerNumShowing+'"'));
				hideLayer(eval('"layertext' + layerNumShowing+'"'));
				document["dot" + layerNumShowing].src = eval("dotoff.src");
                showLayer(eval('"layer' + layerNumToShow+'"'));
				showLayer(eval('"layertext' + layerNumToShow+'"'));
				document["dot" + layerNumToShow].src = eval("doton.src");
                layerNumShowing=layerNumToShow;         }

        function showNextLayer(c){
                var layerNumToShow=layerNumShowing+1;
                if (layerNumToShow > c){layerNumToShow=1;}
                hideLayer(eval('"layer' + layerNumShowing+'"'));
				hideLayer(eval('"layertext' + layerNumShowing+'"'));
				document["dot" + layerNumShowing].src = eval("dotoff.src");
                showLayer(eval('"layer' + layerNumToShow+'"'));
				showLayer(eval('"layertext' + layerNumToShow+'"'));
				document["dot" + layerNumToShow].src = eval("doton.src");
                layerNumShowing=layerNumToShow;         }