browserName = navigator.appName;
	browserVer = parseInt ( navigator.appVersion );
	
	version = "n2";
	if ( browserName == "Netscape" && browserVer >= 3 ) version = "n3";
	if ( browserName == "Microsoft Internet Explorer" && browserVer >=4 ) version = "e4";
	
	
	if ( version == "n3" || version == "e4" ){
	
	/*
	if (document.images) {
	  image1on = new Image();
	  image1on.src = "/interface/imgs/tab_on_01.jpg";
	  image2on = new Image();
	  image2on.src = "/interface/imgs/tab_on_02.jpg";
	  image3on = new Image();
	  image3on.src = "/interface/imgs/tab_on_03.jpg";
	  image4on = new Image();
	  image4on.src = "/interface/imgs/tab_on_04.jpg";
	 
	  image1off = new Image();
	  image1off.src = "/interface/imgs/tab_off_01.jpg";
	  image2off = new Image();
	  image2off.src = "/interface/imgs/tab_off_02.jpg";
	  image3off = new Image();
	  image3off.src = "/interface/imgs/tab_off_03.jpg";
	  image4off = new Image();
	  image4off.src = "/interface/imgs/tab_off_04.jpg";
	 
	}*/
		function showtab(name) {
		
		
			hide('panel1');
			hide('panel2');
			hide('panel3');
			
			//hide('panel4');
		
			if(name=='tab1'){	
				//document.tab1.src=image1on.src;
				show('panel1');
			}
			//else document.tab1.src=image1off.src; 
			if(name=='tab2'){
				//document.tab2.src=image2on.src;
				show('panel2');
			}//else document.tab2.src=image2off.src;
			if(name=='tab3'){
				//document.tab3.src=image3on.src;
				show('panel3');
			}//else document.tab3.src=image3off.src;
			/*
			if(name=='tab4'){
				//document.tab4.src=image4on.src;
				show('panel4');
			}//else document.tab4.src=image4off.src;*/
			}
			
			
			function hide(layer_ref) { 
			
				
				var state = 'none'; 
				 
			
				if (document.all) { //IS IE 4 or 5 (or 6 beta) 
					eval( "document.all." + layer_ref + ".style.display = state"); 
				} 
				if (document.layers) { //IS NETSCAPE 4 or below 
					document.layers[layer_ref].display = state; 
				} 
				if (document.getElementById &&!document.all) { 
					hza = document.getElementById(layer_ref); 
					hza.style.display = state; 
				} 
			} 
			function show(layer_ref) { 
			
				
				var state = 'block'; 
				 
			
				if (document.all) { //IS IE 4 or 5 (or 6 beta) 
					eval( "document.all." + layer_ref + ".style.display = state"); 
				} 
				if (document.layers) { //IS NETSCAPE 4 or below 
					document.layers[layer_ref].display = state; 
				} 
				if (document.getElementById &&!document.all) { 
					hza = document.getElementById(layer_ref); 
					hza.style.display = state; 
				} 
			} 
			
	

	}