/* 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 key objects/methods and 
assembling a custom document object */


/* document.layers detects Netscape 4.* */
/* document.all works for IE */
/* document. GetElementById() works for W3C DOM compliant browsers 
(Netscape 6 and 7 and future ones */



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";
 }

	function lightup(imgName,topic,clas)
	 {
	   //alert(imgName + " - " + topic + " - " + clas);
	   if (document.images)
	    {
	      imgOn=eval(imgName + "onsrc");
		  if(clas == "menuNavOn"){
			imgOn=eval(imgName + "bonsrc");
		  }
	      document[imgName].src = imgOn;
	    }
	 }

	function turnoff(imgName,topic,clas)
	 {
	   if (document.images)
	    {
	     
	      imgOff=eval(imgName + "offsrc");
		  if(clas == "menuNavOn"){
			//alert(eval(imgName + "bsrc"));
			imgOff=eval(imgName + "bsrc");
		  }
	      //alert(topic + " - "  + imgOff);
	      document[imgName].src = imgOff;
	    }
	 } 
 
 

// 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

// This could be improved using and Array but it works fine this way also.

var loaded = 0;
var navdir = GetRootPath() + "mnasthma/imgs/Topnavigation/";

function preload() {

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 = "#234c7d";
var offcolor = "#d9eafa";
var ontxcolor = "#fbf100";
var offtxcolor = "#ffffff";

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

function changetextcolor(divname,colorname) {
stopall();
if (!n4) {
menuObj = eval(doc + divname + sty);
menuObj.color = 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 = 100;

// 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) {
//alert(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 = centerhor - 385;
memoff = mainmenuleft;
 }
else {
mainmenuleft = centerhor - 372;
memoff = mainmenuleft - 125;
     }



// We have left the variables for a sub-sub menu even when we are not using one for ALAMN (yet)


}