//Define global variables

	    var timerID = null;
		var timerOn = false;
		var timecount = 1000;
		var what = null;
		var newbrowser = true;
		var check = false;

    	function initLayers(){
    	//  alert ("Running Init");
          if (document.layers) {
                      //  alert ("Running Netscape 4");
                        layerRef="document.layers";
                        styleSwitch="";
                        visibleVar="show";
			screenSize = window.innerWidth;
			what ="ns4";


          }else if(document.all){
                      //  alert ("Running IE");
                        layerRef="document.all";
                        styleSwitch=".style";
                        visibleVar="visible";
			screenSize = document.body.clientWidth + 18;
			what ="ie";

		  }else if(document.getElementById){
                      //  alert ("Running Netscape 6");
                        layerRef="document.getElementByID";
                        styleSwitch=".style";
                        visibleVar="visible";
			what="moz";
		  
		  }else{
		  	//alert("Older than 4.0 browser.");
			what="none";
			newbrowser = false;
		  }
		  
 
		//window.status=what;
		check = true;
  	 	}

	// Turns the layers on and off
        function showLayer(layerName,loc){
        	if(check){
        		if (what =="none"){
        			return;
        			}
	        	else if (what == "moz"){
				if(loc) 
				document.getElementById(layerName).style.top=loc+"px";
        			document.getElementById(layerName).style.visibility="visible";
				document.getElementById(layerName).focus();
        			}
        		else{
				if(loc)
				eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.top="'+loc+'px"');
				eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
                  }
		 }
        	else {// alert ("Please wait for the page to finish loading.");
        		return;}
		}

        function hideLayer(layerName){
        	if(check){
        		if (what =="none"){
        			return;
        			}
        		else if (what == "moz"){
        			document.getElementById(layerName).style.visibility="hidden";
        			}
        		else{
                  eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
				}
        
        	}
        	else {// alert ("Please wait for the page to finish loading.");
        		return;}
        }
	
	function calcPosition(num) {
        	if(check){
        		if (what =="none"){
        				return 0;
        			}
        		else if (what == "moz"){
        				return window.pageYOffset+num;
        			}
        		else{
				if(!mainpage.scrollTop)
					return document.body.scrollTop+num;
				else
					return mainpage.scrollTop+num;
			}
        
        	}
        	else { return 0;}		
	}