function MM_findObj(n) {
         var p,i,x; d=document; if(!(x=d[n])&&d.all)x = d.all[n];
         for(i=0;!x&&d.layers&&i<d.layers.length;i++)x=MM_findObj(n,d.layers[i].document);
         if(!x&&document.getElementById)x=document.getElementById(n);return x; }

        function MM_showHideLayers() {
         var i,p,v,obj,args=MM_showHideLayers.arguments; i=0;
         if((obj=MM_findObj(args[i]))!=null) { v=args[i+1];
         if(obj.style) {obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v;
         } obj.visibility=v; } }

	function show_layer (thislayer) {

		MM_showHideLayers('web_design', 'hide');
		MM_showHideLayers('online_shopping', 'hide');
		MM_showHideLayers('attracting_visitors', 'hide');
		MM_showHideLayers('hosting', 'hide');
		MM_showHideLayers('other_services', 'hide');
		MM_showHideLayers('about_us', 'hide');

		if (thislayer != 'none') {
			MM_showHideLayers(thislayer, 'show');
		}
	}