isOPERA = (navigator.userAgent.indexOf('Opera') >= 0)? true : false;
isIE    = (document.all && !isOPERA)? true : false;
isDOM   = (document.getElementById && !isIE && !isOPERA)? true : false;


/*FUNCTION Swap clicked image 
	Changes the clicked image to another image. 
	In this case, we're switching from an image with a black square to an image with an orange square.
	Required: images must be differentiated in a consistent way.
	
	Set the values for the image extension and image suffix
*/
var imgExt = "gif"; //If the images are JPEGs or PNGS, use 'jpg' or 'png' respectively. No dot required.
var imgSuffix = "_o";
var currentMenu = 0;
var menuId;
var menuToShow;
var clickedHeader;

function swapClickedImage(obj,stat){
	if(!obj){
		return false;
	}else{
		if(currentMenu>0){
			var pageMenu = "hdr"+currentMenu;
				if((obj.id == pageMenu)&&(obj.src.indexOf(imgSuffix) != -1)){
					return;
				}
					var srcStr = obj.src;
						if(stat){
							var modStr = srcStr.replace("."+imgExt,imgSuffix+"."+imgExt);
							obj.src = modStr;
						}else{
							var modStr = srcStr.replace(imgSuffix+"."+imgExt,"."+imgExt);
							obj.src = modStr;
						}
				
			}
	}
}



function showPage(id)
{
	currentMenu = id;
	clickedHeader = document.getElementById("hdr"+id);
	swapClickedImage(clickedHeader,true);
}
//Show a menu using the id, and swap the image associated with the onclick event
function show (id, displayValue)
{
	menuId = "menu"+id;
	menuToShow;
	clickedHeader = document.getElementById("hdr"+id);
	if (isDOM){
		menuToShow = document.getElementById(menuId);
		//If the object is already visible, hide it
		if(menuToShow.style.display=="block"){
			swapClickedImage(clickedHeader,false);
			hide(id);
			return;
		}
		swapClickedImage(clickedHeader,true);
		menuToShow.style.display = (displayValue)? displayValue : "block";
		}
	else if (isIE){
		menuToShow = document.all[menuId];
		//If the object is already visible, hide it
		if(menuToShow.style.display=="block"){
			swapClickedImage(clickedHeader,false);
			hide(menuId);
			return;
		}
		swapClickedImage(clickedHeader,true);
		document.all[menuId].style.display = "block";
		}
}
//Hide the specified menu
function hide (id)
	{
		if (isDOM || isIE){
			document.getElementById(menuId).style.display = "none";
			}
		else if (isIE){
			document.all[id].style.display = "none";
			}
	}

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_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_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];}
   }
}
function void_MM_Swap(imgId){
		if(document.getElementById(cPageImg)){
			var imgObj = document.getElementById(cPageImg);
			//alert(imgObj);
			imgObj.parentElement.onmouseover = voidMM;
			//imgOjb.parentElement.onmouseout = voidMM;
		}
	}
	function voidMM(){
		return false;
	}