function imgSwap(oImg)
{
   var strOver  = "Hover"    // image to be used with mouse over
   var strOff = "Normal"     // normal image
   var strImg = oImg.src
   if (strImg.indexOf(strOver) != -1) 
      oImg.src = strImg.replace(strOver,strOff)
   else
      oImg.src = strImg.replace(strOff,strOver)
}

function showdiv(name){
    var obj = (document.getElementById)? document.getElementById(name) : eval("document.all[name]");
    if (obj.style.display=="none"){
        obj.style.display="";
    }else{
        obj.style.display="none";
    }
} 

/*
JSTarget function by Roger Johansson, www.456bereastreet.com
*/
var JSTarget = {
	init: function(att,val,warning) {
		if (document.getElementById && document.createElement && document.appendChild) {
			var strAtt = ((typeof att == 'undefined') || (att == null)) ? 'class' : att;
			var strVal = ((typeof val == 'undefined') || (val == null)) ? 'non-html' : val;
			var strWarning = ((typeof warning == 'undefined') || (warning == null)) ? ' (opens in a new window)' : warning;
			var oWarning;
			var arrLinks = document.getElementsByTagName('a');
			var oLink;
			var oRegExp = new RegExp("(^|\\s)" + strVal + "(\\s|$)");
			for (var i = 0; i < arrLinks.length; i++) {
				oLink = arrLinks[i];
				if ((strAtt == 'class') && (oRegExp.test(oLink.className)) || (oRegExp.test(oLink.getAttribute(strAtt)))) {
					oWarning = document.createElement("em");
					oWarning.appendChild(document.createTextNode(strWarning));
					oLink.appendChild(oWarning);
					oLink.onclick = JSTarget.openWin;
				}
			}
			oWarning = null;
		}
	},
	openWin: function(e) {
		var event = (!e) ? window.event : e;
		if (event.shiftKey || event.altKey || event.ctrlKey || event.metaKey) return true;
		else {
		    var oWin = window.open(this.getAttribute('href'), '_blank');
			if (oWin) {
				if (oWin.focus) oWin.focus();
				return false;
			}
			oWin = null;
			return true;
		}
	},
	/*
	addEvent function from http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html
	*/
	addEvent: function(obj, type, fn) {
		if (obj.addEventListener)
			obj.addEventListener(type, fn, false);
		else if (obj.attachEvent) {
			obj["e"+type+fn] = fn;
			obj[type+fn] = function() {obj["e"+type+fn]( window.event );}
			obj.attachEvent("on"+type, obj[type+fn]);
		}
	}
};
JSTarget.addEvent(window, 'load', function(){JSTarget.init("rel","external","");});


// extract the file name from a URL 
//(if input is '/files/index.html', output is 'index')
function extractPageName(hrefString)
{
 var arr = hrefString.split('.');
 if(arr.length >= 2) {
  arr = arr[arr.length-2].split('/');
  return arr[arr.length-1].toLowerCase();
 } else {
  return "x";
 }
}

// search through all the links in array, if one points to
// the same file, apply the class .current to it and to its 
// parent
function setActiveMenu(arr, crtPage)
{
	for(var i=0; i < arr.length; i++)
		if(extractPageName(arr[i].href) == crtPage)
		{
			arr[i].className = "current";
			arr[i].parentNode.className = "current";
		}
}

function setPage()
{
	if(document.location.href) 
		hrefString = document.location.href;
	else
		hrefString = document.location;

	if (document.getElementById("sectionNavigation")!=null) 
		setActiveMenu(document.getElementById("sectionNavigation").getElementsByTagName("a"), extractPageName(hrefString));
}

window.onload=setPage;

/*
    Written by Jonathan Snook, http://www.snook.ca/jonathan
    Add-ons by Robert Nyman, http://www.robertnyman.com
*/

function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}



// From http://weblogs.asp.net/rajbk/archive/2003/12/11/setting-the-default-button-for-a-textbox-in-asp-net.aspx
// Set default submit button on textbox
function clickButton(e, buttonid){

      var evt = e ? e : window.event;

      var bt = document.getElementById(buttonid);

      if (typeof bt == 'object'){

          if (evt.keyCode == 13){

                bt.click();

                return false;

          }

      }

}