function toggleLayer(whichLayer)
{
    // hide all the divs
    document.getElementById('main').style.display = 'none';
    document.getElementById('formula').style.display = 'none';
    document.getElementById('suggest').style.display = 'none';
    document.getElementById('comment').style.display = 'none';
    document.getElementById('tags').style.display = 'none';
    document.getElementById('terms').style.display = 'none';

    // show the requested div
    document.getElementById(whichLayer).style.display = 'block';

}

function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   myfield.form.submit();
   return false;
   }
else
   return true;
}

function addToFavorites() 
{
	
	if (window.sidebar)
	{
		window.sidebar.addPanel("WebmasterScore", "http://www.webmasterscore.com","");
	}
	else if (window.external)
	{ 
		window.external.AddFavorite("http://www.webmasterscore.com","WebmasterScore");
	} 
}


function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

var request = false;
try 
{
	request = new XMLHttpRequest();
} 
catch (trymicrosoft) {
	try 
	{
		request = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch (othermicrosoft) 
	{
		try 
		{
			request = new ActiveXObject("Microsoft.XMLHTTP");
		} 
		catch (failed) 
		{
			request = false;
		}
	}
}

if (!request)
	alert("Error initializing XMLHttpRequest! Please refresh the page.");


function logReview(url) {
	var rand = Math.floor(Math.random() * 1000);
	url = url + "&rand="+rand;
	request.abort();
	request.onreadystatechange = stateHand;
	request.open("GET", url, true);
	request.send(null);
	return true;
}

function stateHand() {
	return true;
}

function isUrl(s) {
	var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	return regexp.test(s);
}

function IsNumeric(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;
 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}

function alphanumeric(alphane)
{
	var numaric = alphane;
	for(var j=0; j<numaric.length; j++)
		{
		  var alphaa = numaric.charAt(j);
		  var hh = alphaa.charCodeAt(0);
		  if((hh > 47 && hh<58) || (hh > 64 && hh<91) || (hh > 96 && hh<123) || (alphaa == "_") || (alphaa == "@") || (alphaa == ".") || (alphaa == "!"))
		  {
		  }
		else	{
			 return false;
		  }
		}
 return true;
}

function isDomain(domString)
{
	if (domString.indexOf(".") < 2)
		return false;
	if (domString.length < 2)
		return false;
		
	return true;
}