/* define variables for "if n4 (Netscape 4), if IE (IE 4.x), 
and if n6 (if Netscape 6/W3C-DOM compliant)" */

var n4, ie, n6;

/* detecting browser support for certain key objects/methods and 
assembling a custom document object */


var doc,doc2,doc3,sty;

if (document.layers) {
  doc = "document.";
  doc2 = ".document.";
  doc3 = "";
  sty = "";
  n4 = true;
  }
else if (document.all) {
  doc = "document.all.";
  doc2 = "";
  doc3 = "";
  sty = ".style";
  ie = true;
}

else if (document.getElementById) {
  doc = "document.getElementById('";
  doc2 ="')";
  doc3 ="')";
  sty = "').style";
  n6 = "true";
 } 
 
 

// the variables for the window dimensions
var win_width,win_height;
var centerhor, centerver;


//Get dimensions of the window
function dimensions() {
if(n4 || n6){
 win_width=window.innerWidth;
 win_height=window.innerHeight;
}

else if(ie) {
  win_width=document.body.clientWidth;
  win_height=document.body.clientHeight;
     }

centerhor = win_width/2;
centerver = win_height/2;
}


//position the element on the page.

function placeIt(elem,leftPos,topPos) {
docObj = eval(doc + elem + sty);
if (n4 || n6) {
docObj.left = leftPos;
docObj.top= topPos;
 }
if (ie) {
docObj.pixelLeft = leftPos;
docObj.pixelTop = topPos;
 }
}

// preload navigation images

var loaded = 0;
var navdir = "../images/nav/";

function preload() {
top_about_off = new Image;
top_about_off.src = navdir + "about-off.gif";

top_about_on = new Image;
top_about_on.src = navdir + "about-on.gif";

top_projects_off = new Image;
top_projects_off.src = navdir + "projects-off.gif";

top_projects_on = new Image;
top_projects_on.src = navdir + "projects-on.gif";

/*top_themes_off = new Image;
top_themes_off.src = navdir + "themes-off.gif";

top_themes_on = new Image;
top_themes_on.src = navdir + "themes-on.gif";
*/
top_learning_off = new Image;
top_learning_off.src = navdir + "learning-off.gif";

top_learning_on = new Image;
top_learning_on.src = navdir + "learning-on.gif";

top_contact_off = new Image;
top_contact_off.src = navdir + "contact-off.gif";

top_contact_on = new Image;
top_contact_on.src = navdir + "contact-on.gif";

top_sitemap_off = new Image;
top_sitemap_off.src = navdir + "sitemap-off.gif";

top_sitemap_on = new Image;
top_sitemap_on.src = navdir + "sitemap-on.gif";

loaded = 1;
}

// img src swap function
function onoff (elemparent,elem,state) {
if (loaded) {
newstate = eval(elem+"_"+state);
if (n4) {
menuObj = eval (doc + elemparent + doc2 + elem);
 }
else if (ie || n6) {
menuObj = eval (doc + elem + doc2);
 }
menuObj.src = newstate.src;
 }
}


// mouse over (on) and mouseoff(off) color values
var oncolor = "#c7e3e3";
var offcolor = "#ffffcc";

function changecolor(divname,colorname) {
stopall();
if (!n4) {
menuObj = eval(doc + divname + sty);
menuObj.backgroundColor = colorname;
  }
}

// show or hide DIV element
function showhide(divname,state) {
if (n4) {
divObj = eval (doc + divname);
 }
else {
divObj = eval (doc + divname + sty);
}
divObj.visibility = state;
}


// variables that hold the value of the currently active (open) menu
var active_submenu1 = null;
var active_submenu2 = null;
var active_menuelem = null;
var active_topelem = null;

// function closes all active menus and turns back to 'off' state
function closeallmenus() {
if(active_submenu1 != null) {
  showhide(active_submenu1,'hidden');
  }
if(active_submenu2 != null) {
  showhide(active_submenu2,'hidden');
  }
if(active_menuelem != null) {
  changecolor(active_menuelem,offcolor);
  }
if(active_topelem != null) {
  onoff('mainmenu',active_topelem,'off');
  }
}

// the menu close timeout variable
var menu_close_timeout = 0;

// delay in miliseconds until the open menus are closed
var delay = 900;

// function calls the closeallmenus() function after a delay
function closeall() {
menu_close_timeout = setTimeout('closeallmenus()',delay);
}

// stop all timeout functions (stops menus from closing)
function stopall() {
clearTimeout(menu_close_timeout);
}

// function controls submenus 
function controlsubmenu(submenu1,submenu2,menuelem,topelem) {
stopall();
closeallmenus();
if (submenu1 != null) {
  showhide(submenu1,'visible');
  active_submenu1 = submenu1;
  }
if (submenu2 != null) {
 showhide(submenu2,'visible');
 active_submenu2 = submenu2;
  }
if (menuelem != null) {
 changecolor(menuelem,oncolor);
 active_menuelem = menuelem;
 }
if (topelem != null) {
 onoff('mainmenu',topelem,'on');
 active_topelem = topelem;
 }
}


function initialize() {
preload();
closeallmenus();
stopall();
dimensions();
if (win_width < 800) {
mainmenuleft = 190;
 }
else {
mainmenuleft = 300;
     }
offset1 = 6;
offsetsub = 125;
offset2 = 110;
offset3 = 65;
offset4 = 0;
offset5 = 125;
offset6 = 66;
placeIt('mainmenu',mainmenuleft,32);
placeIt('about',mainmenuleft + offset1,58);
placeIt('projects',mainmenuleft +offset1+offset2,58);
placeIt('themes',mainmenuleft +offset1+offset2+offset3,58);
placeIt('learning',mainmenuleft +offset1+offset2+offset3+offset4,58);

placeIt('aboutpartners',mainmenuleft +offset1+offsetsub,80);
placeIt('projectsafrica',mainmenuleft +offset1+offset2+offsetsub,60);
placeIt('projectsasia',mainmenuleft +offset1+offset2+offsetsub,80);
placeIt('projectseurope',mainmenuleft +offset1+offset2+offsetsub,100);
placeIt('projectslatinamerica',mainmenuleft +offset1+offset2+offsetsub,120);
}