//Define global variables
	    var timerID = null;
		var timerOn = false;
		var timecount = 500;
		var what = null;
		var newbrowser = true;
		var check = false;

function init() {
      //alert ("Running Init"+id);

      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='status bar text to go here';
		check = true;
  	 	}

function showLayer(layerName){
   if(check){
        		if (what =="none"){
        			return;
        			}
	        	else if (what == "moz"){
        			document.getElementById(layerName).style.visibility="visible";
        			}
        		else{
                  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 hideAll(){
			hideLayer('PullHandling');
			hideLayer('PullTalking');
			hideLayer('PullBeyond');
			hideLayer('PullCould');
			hideLayer('PullResources');
			hideLayer('PullForParents');
			hideLayer('PullFacts');					
}

function hideAllResearch(){
			hideLayer('er1');
			hideLayer('er2');
			hideLayer('er3');
			hideLayer('er4');
			hideLayer('er5');
			hideLayer('er6');
}

function startTime() {
	        if (timerOn == false) {
                timerID=setTimeout( "hideAll()" , timecount);
                timerOn = true;
	        }
}

function stopTime() {
	        if (timerOn) {
    	        clearTimeout(timerID);
                timerID = null;
                timerOn = false;
	        }
}

function onLoad(){
			init();
}