//declarations and preliminary assignments
var linkS=""        //string to write links HTML
var menuS="";       //string to write menu HTML
var menuUp=false;   //Are any menus visible?
var mname="";       //name of menu that is currently open
var v=1;						//direction that submenu will expand vertically
var menuGroup =""; //group that a sub belongs to
var floatMenuTop=-300;		// vertical position from link div of floating menu (-300 is 300px upwards).
var floatMenuLeft=150;		// horizontal position from link div of floating menu (150 is 150px left).
var mainBar;							//the main menu bar (always visible).
var preStr="";
//set child button colours - note: main button colours set in style sheet menu.css

//var childBackground="#3d57c7"; 	// child button background colour
var colourOn="#ff0000"					// all buttons colour when on - need to set in menu.css as well
var colourOff="#0000ff"; 			 // all buttons colour when off - need to set in menu.css as well



// constructor for Menu object
function MenuElement(tIn,lIn,idIn,labelIn)
	{
		//attributes
		this.top=tIn;
		this.left=lIn;
		this.id=idIn;											// id of menu element for code manipulation and styles
		this.position=0;									//menus's position in main menu - positions = "F" denote floating menus.
		this.up=false; 										//is the menu expanded to show its elements?
		this.label=labelIn; 							// label that will appear in the menu box.
		this.url="window.location='"+preStr+"'";		// the action that will occur when the menu is clicked.

		//methods

	}

//////////////////////////////////////////////////////////////////////////////////////////////////////////

//set menu expand direction and floating menu relative position - from link div
function makeMenu(vIn)
	{
		v=vIn;
		floatMenuTop=-100*v;
		floatMenuLeft=140;
		declare();
		build()
	}

function declare()
	{
    // get location of calling page and set depth parameter for relative addresses
 //depending on whether on internet or local server
      var locStr=document.location.toString();
      var pattern=/www/;
      var tempStr="";
      var remote=locStr.search(pattern);
      var count=0;
			var k =0;
			var depth;
			for (k=0;k<locStr.length;k++)
				{
				tempStr+=	locStr.charAt(k)
				if (locStr.charAt(k)=='/')
          {
            count++;
          }
				}

      if (remote == -1)
        {
          depth=count-4;
        }
      else
        {
          depth=count-3;
        }
//alert(depth);

    var preStr="";
    while (depth > 0)
      {
        preStr+="../";
        depth--;
      }
 //   alert(preStr);


//////////////////////////////////////////////////////////////////
// declare menu element objects

// second level menu objects

		// prospectus

		earlyYearsBrochureE=new MenuElement(0,0,"earlyYearsBrochure","Early Years");

		earlyYearsBrochureE.url="window.location='"+preStr+"earlyYearsBrochure.html'";

		schoolBrochureE=new MenuElement(0,0,"schoolBrochure","School Brochure");
		schoolBrochureE.url="window.location='"+preStr+"schoolBrochure.html'";


// first level menu objects
	//info


		contactE=new MenuElement(0,0,"contactE","Contact Us");
		contactE.url="window.location='"+preStr+"contact.html'";

		staffE=new MenuElement(floatMenuTop,floatMenuLeft,"staff","Staff");
		staffE.url="window.location='"+preStr+"staff.html'";

		governorsE=new MenuElement(floatMenuTop,floatMenuLeft,"governors","Governors");
		governorsE.url="window.location='"+preStr+"governors.html'";

		brochuresE=new MenuElement(floatMenuTop,floatMenuLeft,"brochures","Brochures");
		brochuresE.url="spawn(brochuresE)";
		brochuresE.child=new Array(earlyYearsBrochureE,schoolBrochureE);
		brochuresE.position="F";
		makeChildren(brochuresE);

    policiesE=new MenuElement(floatMenuTop,floatMenuLeft,"policies","Policies");
		policiesE.url="window.location='"+preStr+"policies.html'";
/*

		aimsE=new MenuElement(0,0,"aims","Our Aims");
		aimsE.url="window.location='"+preStr+"aims.html'";



		ofstedE=new MenuElement(0,0,"ofstedE","Ofsted/SATs");
		ofstedE.url="window.location='"+preStr+"ofsted.html'";

		staffzoneE=new MenuElement(0,0,"staffzone","Staff Zone");
		staffzoneE.url="window.location='/cgi-bin/StaffZone/index.pl'";

*/



	//news

		diaryE=new MenuElement(0,0,"diaryE","Events Diary");
		diaryE.url="window.location='http://www.diary.firstschool.org.uk/cgi-bin/diary.pl?school=St%20Johns'";



		latestE=new MenuElement(0,0,"latest","Latest");
		latestE.url="window.location='"+preStr+"latest.html'";





		newsletterE=new MenuElement(0,0,"newsletter","Newsletters");
		newsletterE.url="window.location='"+preStr+"news.html'";

		holidaysE=new MenuElement(0,0,"holidays","Holidays Dates");
		holidaysE.url="window.location='"+preStr+"hols.html'";

	//schoolLifeE

/*
		classesE=new MenuElement(0,0,"classes","Our Classes");
		classesE.url="window.location='"+preStr+"classes.html'";

		tourE=new MenuElement(0,0,"tour","Tour Our School");
		tourE.url="window.location='"+preStr+"tour.html'";
*/
		gamesE=new MenuElement(0,0,"games","Games");
		gamesE.url="window.location='"+preStr+"games.html'";
/*

		councilE=new MenuElement(0,0,"council","School Council");
		councilE.url="window.location='"+preStr+"council.html'";

		buddiesE=new MenuElement(0,0,"buddies","Buddies");
		buddiesE.url="window.location='"+preStr+"buddies/index.htm'";

		dayE=new MenuElement(0,0,"day","A Day in the Life");
		dayE.url="window.location='"+preStr+"aditl.html'";
*/


		galleryE=new MenuElement(0,0,"gallery","The Gallery");
		galleryE.url="window.location='"+preStr+"gallery.html'";

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// base level menu objects
		homeE=new MenuElement(0,0,"home","Home");
		homeE.url="window.location='"+preStr+"index.html'";

		infoE=new MenuElement(0,120,"info","Information");
		infoE.position=1;
		infoE.url="toggle(infoE)";
		infoE.child=new Array(brochuresE,contactE,governorsE,policiesE,staffE);//aimsE,ofstedE,staffzoneE);
		makeChildren(infoE);

		newsE=new MenuElement(0,240,"news","News");
		newsE.position=2;
		newsE.url="toggle(newsE)";
		newsE.child=new Array(diaryE,holidaysE,latestE,newsletterE);
		makeChildren(newsE);

		schoolLifeE=new MenuElement(0,360,"schoolLife","School Life");
		schoolLifeE.position=3;
		schoolLifeE.url="toggle(schoolLifeE)";
		schoolLifeE.child=new Array(gamesE,galleryE);                   //classesE,galleryE,tourE);
		makeChildren(schoolLifeE);
/*
		clubsE=new MenuElement(0,480,"clubs","Clubs");
		clubsE.position=4;
		clubsE.url="window.location='"+preStr+"clubs.html'";
*/
//specify what elements in main menu bar
		mainBar = new Array(homeE,infoE,newsE,schoolLifeE); //,clubsE);
	}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////

function build(vIn)
  {
  //set up initial divs to take menu details
  	linkS += "<div class=\"menu\" id=\""+mainBar[0].id+"\" onmouseover=\"over('"+mainBar[0].id+"')\" onmouseout=\"off('"+mainBar[0].id+"')\" onclick=\""+mainBar[0].url+"\">"+mainBar[0].label+"</div>";
  	for (var i=1;i<mainBar.length;i++)
			{
  			linkS += "<div id = \"menu"+i+"\"></div>";
  		}
  	linkS += "<div id = \"menuF\"></div>";
	//Write string to page
		document.getElementById("link").innerHTML = linkS;
		document.getElementById(homeE.id).style.top=homeE.top+"px";
 		document.getElementById(homeE.id).style.left=homeE.left+"px";
	for (var i=1;i<mainBar.length;i++)
		{
	// add menu details
			menuS = "<div class=\"menu\" id=\""+mainBar[i].id+"\" onmouseover=\"over('"+mainBar[i].id+"')\" onmouseout=\"off('"+mainBar[i].id+"')\" onclick=\""+mainBar[i].url+"\">"+mainBar[i].label+"</div>";
			document.getElementById("menu"+mainBar[i].position).innerHTML = menuS;
			document.getElementById(mainBar[i].id).style.top=mainBar[i].top+"px";
 			document.getElementById(mainBar[i].id).style.left=mainBar[i].left+"px";
 		}


	}

//Change menu direction of expansion - up or down - depending on position
function menuDirection(groupIn)
	{
		var group=groupIn;
		var t=0;
		var startTop=group.top;
		var l=group.left

		document.getElementById(group.id).style.top=startTop+"px";
		document.getElementById(group.id).style.left=l+"px";

    for (var i=0;i<group.child.length;i++)
			{
				t=startTop+(i+1)*(-30)*v;

				document.getElementById(group.child[i].id).style.top=t+"px";
				document.getElementById(group.child[i].id).style.left=l+"px";
				//document.getElementById(group.child[i].id).style.backgroundColor=childBackground;
				document.getElementById(group.child[i].id).style.color=colourOff;
			}
	}


//create new menu at higher level
function spawn(groupIn)
  {
  	if (!groupIn.up)
  		{
	  		toggle(groupIn.parent);
	  	}
	  toggle(groupIn);
	  groupIn.up=!groupIn.up
		//alert("\t menuUp= "+menuUp+"\t mname= "+mname.id+"\t "+groupIn.id+".up= "+groupIn.up);
	}

// toggle first level menus
function toggle(groupIn)
  {

	  if (!menuUp)
		  {
				mname=groupIn;

		    showMenu(groupIn);
			}
		else
		  {

		    hideMenu(mname);
				if (mname!=groupIn)
				  {
				    mname=groupIn;

		        showMenu(groupIn);
					}
		  }

	}

//select menu and make visible
function showMenu(groupIn)
  {
    menuS= "<div class=\"menu\" id=\""+groupIn.id+"\" onmouseover=\"over('"+groupIn.id+"')\" onmouseout=\"off('"+groupIn.id+"')\" onclick=\""+groupIn.url+"\">"+groupIn.label+"</div>";

		for (var i=0;i<groupIn.child.length;i++)
		  {
 				menuS += "<div class=\"menuA\" id=\""+groupIn.child[i].id+"\" onmouseover=\"over('"+groupIn.child[i].id+"')\" onmouseout=\"off('"+groupIn.child[i].id+"')\" onclick=\""+groupIn.child[i].url+"\">"+groupIn.child[i].label+"</div>";
 			}

		document.getElementById("menu"+groupIn.position).innerHTML = menuS;
		menuUp=true;
		menuDirection(groupIn);
	}

//Minimise menu
function hideMenu(groupIn)
  {
  	if (groupIn.position == "F")
  		{
				document.getElementById("menuF").innerHTML = "";
			}
		else
			{
				document.getElementById("menu"+groupIn.position).innerHTML = "<div class=\"menu\" id=\""+groupIn.id+"\" onmouseover=\"over('"+groupIn.id+"')\" onmouseout=\"off('"+groupIn.id+"')\" onclick=\""+groupIn.url+"\">"+groupIn.label+"</div>";
				document.getElementById(groupIn.id).style.top=groupIn.top+"px";
   			document.getElementById(groupIn.id).style.left=groupIn.left+"px";
			}
		menuUp=false;
	}


//associate element objects as children  with groupIn as parent
function makeChildren(groupIn)
	{
		for (var i=0;i<groupIn.child.length;i++)
			{
				groupIn.child[i].parent=groupIn;
			}
	}

//mouse over highlighting
function over(name)
  {
  	window.document.getElementById(name).style.color=colourOn;
    window.document.getElementById(name).style.cursor="pointer";
  }

function off(name)
  {
    window.document.getElementById(name).style.color=colourOff;
    window.document.getElementById(name).style.cursor="default";
	}

// open up a new window and load url into it
function getPage(urlIn)
		    	{
		    		var url=urlIn
		        w=window.open(url,"newWindow");
						w.moveTo(100,20);
						w.resizeTo(800,600);
						w.focus();
					}