// $Id: drupal.js,v 1.29.2.1 2007/07/15 23:07:06 drumm Exp $

var Drupal = Drupal || {};

/**
 * Set the variable that indicates if JavaScript behaviors should be applied
 */
Drupal.jsEnabled = document.getElementsByTagName && document.createElement && document.createTextNode && document.documentElement && document.getElementById;

/**
 * Extends the current object with the parameter. Works recursively.
 */
Drupal.extend = function(obj) {
  for (var i in obj) {
    if (this[i]) {
      Drupal.extend.apply(this[i], [obj[i]]);
    }
    else {
      this[i] = obj[i];
    }
  }
};

/**
 * Redirects a button's form submission to a hidden iframe and displays the result
 * in a given wrapper. The iframe should contain a call to
 * window.parent.iframeHandler() after submission.
 */
Drupal.redirectFormButton = function (uri, button, handler) {
  // Trap the button
  button.onmouseover = button.onfocus = function() {
    button.onclick = function() {
      // Create target iframe
      Drupal.createIframe();

      // Prepare variables for use in anonymous function.
      var button = this;
      var action = button.form.action;
      var target = button.form.target;

      // Redirect form submission to iframe
      this.form.action = uri;
      this.form.target = 'redirect-target';

      handler.onsubmit();

      // Set iframe handler for later
      window.iframeHandler = function () {
        var iframe = $('#redirect-target').get(0);
        // Restore form submission
        button.form.action = action;
        button.form.target = target;

        // Get response from iframe body
        try {
          response = (iframe.contentWindow || iframe.contentDocument || iframe).document.body.innerHTML;
          // Firefox 1.0.x hack: Remove (corrupted) control characters
          response = response.replace(/[\f\n\r\t]/g, ' ');
          if (window.opera) {
            // Opera-hack: it returns innerHTML sanitized.
            response = response.replace(/"/g, '"');
          }
        }
        catch (e) {
          response = null;
        }

        response = Drupal.parseJson(response);
        // Check response code
        if (response.status == 0) {
          handler.onerror(response.data);
          return;
        }
        handler.oncomplete(response.data);

        return true;
      }

      return true;
    }
  }
  button.onmouseout = button.onblur = function() {
    button.onclick = null;
  }
};

/**
 * Retrieves the absolute position of an element on the screen
 */
Drupal.absolutePosition = function (el) {
  var sLeft = 0, sTop = 0;
  var isDiv = /^div$/i.test(el.tagName);
  if (isDiv && el.scrollLeft) {
    sLeft = el.scrollLeft;
  }
  if (isDiv && el.scrollTop) {
    sTop = el.scrollTop;
  }
  var r = { x: el.offsetLeft - sLeft, y: el.offsetTop - sTop };
  if (el.offsetParent) {
    var tmp = Drupal.absolutePosition(el.offsetParent);
    r.x += tmp.x;
    r.y += tmp.y;
  }
  return r;
};

/**
 * Return the dimensions of an element on the screen
 */
Drupal.dimensions = function (el) {
  return { width: el.offsetWidth, height: el.offsetHeight };
};

/**
 *  Returns the position of the mouse cursor based on the event object passed
 */
Drupal.mousePosition = function(e) {
  return { x: e.clientX + document.documentElement.scrollLeft, y: e.clientY + document.documentElement.scrollTop };
};

/**
 * Parse a JSON response.
 *
 * The result is either the JSON object, or an object with 'status' 0 and 'data' an error message.
 */
Drupal.parseJson = function (data) {
  if ((data.substring(0, 1) != '{') && (data.substring(0, 1) != '[')) {
    return { status: 0, data: data.length ? data : 'Unspecified error' };
  }
  return eval('(' + data + ');');
};

/**
 * Create an invisible iframe for form submissions.
 */
Drupal.createIframe = function () {
  if ($('#redirect-holder').size()) {
    return;
  }
  // Note: some browsers require the literal name/id attributes on the tag,
  // some want them set through JS. We do both.
  window.iframeHandler = function () {};
  var div = document.createElement('div');
  div.id = 'redirect-holder';
  $(div).html('<iframe name="redirect-target" id="redirect-target" class="redirect" onload="window.iframeHandler();"></iframe>');
  var iframe = div.firstChild;
  $(iframe)
    .attr({
      name: 'redirect-target',
      id: 'redirect-target'
    })
    .css({
      position: 'absolute',
      height: '1px',
      width: '1px',
      visibility: 'hidden'
    });
  $('body').append(div);
};

/**
 * Delete the invisible iframe
 */
Drupal.deleteIframe = function () {
  $('#redirect-holder').remove();
};

/**
 * Freeze the current body height (as minimum height). Used to prevent
 * unnecessary upwards scrolling when doing DOM manipulations.
 */
Drupal.freezeHeight = function () {
  Drupal.unfreezeHeight();
  var div = document.createElement('div');
  $(div).css({
    position: 'absolute',
    top: '0px',
    left: '0px',
    width: '1px',
    height: $('body').css('height')
  }).attr('id', 'freeze-height');
  $('body').append(div);
};

/**
 * Unfreeze the body height
 */
Drupal.unfreezeHeight = function () {
  $('#freeze-height').remove();
};

/**
 * Wrapper to address the mod_rewrite url encoding bug
 * (equivalent of drupal_urlencode() in PHP).
 */
Drupal.encodeURIComponent = function (item, uri) {
  uri = uri || location.href;
  item = encodeURIComponent(item).replace(/%2F/g, '/');
  return (uri.indexOf('?q=') != -1) ? item : item.replace(/%26/g, '%2526').replace(/%23/g, '%2523').replace(/\/\//g, '/%252F');
};

// Global Killswitch on the <html> element
if (Drupal.jsEnabled) {
  document.documentElement.className = 'js';
}


/************
* Added common.js
*/

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}

MM_reloadPage(true);

window.CMenus=[];
var BLANK_IMAGE="http://www.covenant.edu/images/shared/spacer.gif";
function bw_check(){var is_major=parseInt(navigator.appVersion);this.nver=is_major;this.ver=navigator.appVersion;this.agent=navigator.userAgent;this.dom=document.getElementById?1:0;this.opera=window.opera?1:0;this.ie5=(this.ver.indexOf("MSIE 5")>-1&&this.dom&&!this.opera)?1:0;this.ie6=(this.ver.indexOf("MSIE 6")>-1&&this.dom&&!this.opera)?1:0;this.ie4=(document.all&&!this.dom&&!this.opera)?1:0;this.ie=this.ie4||this.ie5||this.ie6;this.mac=this.agent.indexOf("Mac")>-1;this.ns6=(this.dom&&parseInt(this.ver)>=5)?1:0;this.ie3=(this.ver.indexOf("MSIE")&&(is_major<4));this.hotjava=(this.agent.toLowerCase().indexOf('hotjava')!=-1)?1:0;this.ns4=(document.layers&&!this.dom&&!this.hotjava)?1:0;this.bw=(this.ie6||this.ie5||this.ie4||this.ns4||this.ns6||this.opera);this.ver3=(this.hotjava||this.ie3);this.opera7=((this.agent.toLowerCase().indexOf('opera 7')>-1) || (this.agent.toLowerCase().indexOf('opera/7')>-1));this.operaOld=this.opera&&!this.opera7;return this;};
function nn(val){return val != null;}
function und(val){return typeof(val) == 'undefined';}
function covmenu(name, items){
	this.REGISTERED=0;
	this.bw=new bw_check();this.bi=new Image();this.bi.src=BLANK_IMAGE;
	if (!window.CMenus) window.CMenus=[];
	window.CMenus[name]=this;
	if (!window.CMenuHideTimers) window.CMenuHideTimers=[];
	window.CMenuHideTimers[name]=null;this.name=name;this.root=[];this.root.par=null;
	this.root.cd=[];this.root.fmt=items[0];this.items=[];
	this.root.frameoff = items[0].pos?items[0].pos:[0,0];
	this.root.lvl=new CMenuLevel(this, this.root);
	for (var i=1;i<items.length;i++) if (!und(items[i])) new CMenuItem(this, this.root, items[i], und(items[i].format)?items[0]:items[i].format);
	this.wm_get_pos=function(){if(this.bw.ns4) return; var ml=99999; var mt=0; var c=this.root.cd;for (var i=0;i<c.length;i++){if (c[i].pos[0]<ml) ml = c[i].pos[0];if (c[i].pos[1]>mt) mt = c[i].pos[1];}var fn=this.root.cd[0];return [parseInt(ml),parseInt(mt+fn.size[0]+fn.style.shadow)];}
	this.wm_show=function(){if(this.bw.ns4) return; var div = get_div(this.name+'_wm');div.style.visibility='visible';}
	this.wm_move=function(){if(this.bw.ns4) return; var p = this.wm_get_pos();var div = get_div(this.name+'_wm');if (this.bw.ns4) div.moveTo(p[0],p[1]); else{div.style.left=p[0];div.style.top=p[1];}}
	this.wm_draw=function(x,y){if(this.bw.ns4) return; var p = this.wm_get_pos();document.write(adiv(this.bw, this.name+'_wm', 0,p[0],p[1] ,30,10,'',unescape(''),'',''));}
	this.draw=function (){ for (var i=0;i<this.items.length;i++) document.write(this.items[i].draw()); this.wm_draw();}
	this.hide=function(){
		if (this.root.fmt.popup) 
			this.root.lvl.vis(0);
		else {
			for (var i=0;i<this.root.cd.length;i++) if (this.root.cd[i].lvl) this.root.cd[i].lvl.vis(0);
			this.root.lvl.a=null;
			this.root.lvl.draw();
			if (this.root.fmt.hidden_top) this.root.lvl.vis(0);
		}
	}
	this.mpopup=function(ev,offX,offY){
		var x=ev.pageX?ev.pageX:(this.bw.opera?ev.clientX:this.bw.ie4?ev.clientX+document.body.scrollLeft:ev.x+document.body.scrollLeft);
		var y=ev.pageY?ev.pageY:(this.bw.opera?ev.clientY:this.bw.ie4?ev.clientY+document.body.scrollTop:ev.y+document.body.scrollTop);
		var po=this.root.fmt.popupoff;
		y += offY?offY:po?po[0]:0;
		x += offX?offX:po?po[1]:0;
		this.popup(x, y);
	}
	this.popup=function(x,y){
		this.move(x,y);
		this.root.lvl.a=null;
		this.root.lvl.vis(1);
		mEvent(this.name,0,'t');
		mEvent(this.name,0,'0');
	}
	this.move=function(x,y){
		if (!this.root.pos || this.root.pos[0] != x || this.root.pos[1] != y) {
			this.root.pos=[x,y];
			this.root.loff=[0,0];
			this.root.ioff=[0,0];
			for (var i=0;i<this.items.length;i++){
				this.items[i].setPosFromParent();
				this.items[i].move(this.items[i].pos[0],this.items[i].pos[1]);
			}
			this.wm_move();
		}
	}
	this.draw();
	this.wm_show();
	if (!this.root.fmt.popup && !this.root.fmt.hidden_top) 
		this.root.lvl.vis(1)
	else
		this.root.lvl.vis(0)
}

function CMenuLevel(menu, par){
	this.menu=menu;
	this.par=par;
	this.v=0;
	this.vis=function(s){
		var ss=this.v;
		this.v=s;
		var l=this.par.cd.length;
		for (var i=0;i<l;i++){
			var n=this.par.cd[i];
			if ( n.hc() && n.lvl.v && !s ) n.lvl.vis(s);
			n.vis(s);
		}
		if (!s) this.a=null;
		if (this.v!=ss&&this.menu.onlevelshow) this.menu.onlevelshow(this);
	}
	this.setA=function(idx,s){
        var n=this.menu.items[idx];
		if (nn(this.a)&&n.par.lvl!=this.a.par.lvl) return;
		if(s&&n.hc())n.lvl.vis(1);
		if( s && n!= this.a && nn(this.a) && this.a.hc() && this.a.lvl.v ) this.a.lvl.vis(0);
		this.a=n;
		this.draw();
	}
	this.draw=function(){
		if (this.menu.root.lvl==this&&this.menu.root.fmt.hidden_top) return;
		for (var i=0;i<this.par.cd.length;i++)
			if (this.par.cd[i]==this.a)
				this.par.cd[i].setVis('o');
			else
				this.par.cd[i].setVis('n');
	}
}

function CMenuItem(menu, par, item, format){
	if (und(item)) return;
	this.lvl=null;this.par=par;
	this.code=item.code;
	this.ocode=item.ocode?item.ocode:item.code;
	this.targ=und(item.target)?"":'target="'+item.target+'" ';
	this.url=und(item.url)?"javascript:none()":item.url;
	this.fmt=format;this.menu=menu;this.bw=menu.bw;this.cd=[];
	this.divs=[];this.index=menu.items.length;
	menu.items[menu.items.length]=this;
	this.pindex=par.cd.length;
	par.cd[par.cd.length]=this;
	this.id="cmi"+this.menu.name+"_"+this.index;
	this.v=0;this.state='n';this.diva=["b","s","o","n","e"];
	this.hc=function(){return this.cd.length > 0};
	this.div=function(n){return und(this.divs[n])?this.divs[n]=get_div(this.id+n):this.divs[n]};
	this.draw=function (){	
		var b=this.style.border;
		var s=this.style.shadow;
		return (!this.style.shadow?"":adiv(this.menu.bw, this.id+"s", parseInt(this.z)+1, this.pos[0]+s, this.pos[1]+s, this.size[1], this.size[0], this.style.color.shadow, "", ""))+
				(!this.style.border?"":adiv(this.menu.bw, this.id+"b", parseInt(this.z)+2, this.pos[0], this.pos[1], this.size[1], this.size[0], this.style.color.border, "", ""))+
				adiv(this.menu.bw, this.id+"o", parseInt(this.z)+3, this.pos[0]+b, this.pos[1]+b, this.size[1]-b*2, this.size[0]-b*2, this.style.color.bgOVER, '<div class="'+this.style.css.OVER+'">'+this.ocode+'</div>', "")+
				adiv(this.menu.bw, this.id+"n", parseInt(this.z)+4, this.pos[0]+b, this.pos[1]+b, this.size[1]-b*2, this.size[0]-b*2, this.style.color.bgON, '<div class="'+this.style.css.ON+'">'+this.code+'</div>', "")+
				adiv(this.menu.bw, this.id+"e", parseInt(this.z)+5, this.pos[0]+b, this.pos[1]+b, this.size[1]-b*2, this.size[0]-b*2, "", '<a href="'+this.url+'" '+this.targ+'onclick="mEvent(\''+this.menu.name+'\','+this.index+',\'c\');"  onmouseover="mEvent(\''+this.menu.name+'\','+this.index+',\'o\');" onmouseout="mEvent(\''+this.menu.name+'\','+this.index+',\'t\');">'+'<img src="'+this.menu.bi.src+'" width="'+this.size[1]+'" height="'+this.size[0]+'" border="0"></a>', "", '' );
	}
	this.vis=function(s){
			if (this.style.shadow) this.visDiv("s",s);
			if (this.style.border) this.visDiv("b",s);
			if (!s) {this.visDiv("o",0);this.visDiv("n",0);this.state="n";}
			else if (this.state=="n")
				this.visDiv("n",1);
			else
				this.visDiv("o",1);
			this.visDiv("e",s);
	}
	this.setVis=function (n){
		if (this.state!=n)
			switch (n){
				case "n":this.visDiv("n",1);this.visDiv("o",0);break;
				case "o":this.visDiv("n",0);this.visDiv("o",1);break;
			}
		this.state=n;
	}
	this.visDiv=this.bw.ns4? visDivNS:visDivDom;
	this.getf=function(obj, name){
		if (!und(obj) && nn(obj) && !und(obj.fmt)) {
			if (!und(obj.fmt[name]))
				return obj.fmt[name]; 
			if (obj.par!=this.menu.root && obj.par && obj.par.sub && obj.par.sub[0][name]) 
				return obj.par.sub[0][name]; 
			return this.getf(obj.par, name);}
		return;
	}
	this.ioff=this.getf(this, "itemoff");
	this.loff=this.getf(this, "leveloff");
	this.style=this.getf(this, "style");
	this.size=this.getf(this, "size");
	this.prev=this.pindex==0? null : this.par.cd[this.pindex-1];
	this.setPos=function(){
		if (this.prev==null){
			this.z=this.par == this.menu.root? 0: parseInt(this.par.z)+10;
			this.pos=und(this.fmt.pos)?(this.par == this.menu.root? this.menu.root.fmt.pos : this.pos=[this.par.pos[0]+this.loff[1], this.par.pos[1]+this.loff[0]]):this.fmt.pos;
		}else{
			this.prev.next=this;
			this.z=this.prev.z;
			this.pos=[this.prev.pos[0]+this.ioff[1], this.prev.pos[1]+this.ioff[0]];
		}
	}
	this.setPos();
	this.sub=item.sub;
	if (!und(this.sub) && !und(this.sub.length)&& this.sub.length>0){
		this.lvl=new CMenuLevel(menu, this);
		for (var i=1;i<this.sub.length;i++)
			if (!und(this.sub[i])) new CMenuItem(this.menu, this, this.sub[i], und(this.sub[i].format)?this.sub[0]: this.sub[i].format);
	}
	this.setPosFromParent=function(){
		if (this.index == 0) {
			this.pos=[this.menu.root.pos[0], this.menu.root.pos[1]]
		} else 
		if (this.prev==null){
			this.pos=[this.par.pos[0]+this.loff[1], this.par.pos[1]+this.loff[0]];
		}else{
			this.pos=[this.prev.pos[0]+this.ioff[1], this.prev.pos[1]+this.ioff[0]];
		}
	}
	this.move=function( x, y ){
		var bl=bt=this.style.border;
		if (this.style.shadow) this.moveTo(x+parseInt(this.style.shadow),y+parseInt(this.style.shadow),"s");
		if (this.style.border) this.moveTo(x,y,"b");
		this.moveTo(x+bl,y+bt,"o");
		this.moveTo(x+bl,y+bt,"n");
		this.moveTo(x+bl,y+bt,"e");
	}
	this.moveTo=function( x, y, b ){
		if (this.bw.ns4){
			this.div(b).moveTo(x,y);
		}else{
			this.div(b).style.left=x;
			this.div(b).style.top=y;
		}
	}
	return this;
}
function adiv(bw,name,z,left,top,width,height,bgc,code,otherCSS, otherDIV){return bw.ns4?'<layer id="'+name+'" z-index="'+z+'" left="'+left+'" top='+top+'" width="'+width+'" height="'+height+'"'+(bgc!=""?' bgcolor="'+bgc+'"':'')+' style="'+otherCSS+'" visibility="hidden" '+otherDIV+'>'+code+'</layer>\n':'<div id="'+name+'" style="position:absolute;z-index:'+z+';left:'+left+'px;top:'+top+'px;width:'+width+'px;height:'+height+'px;visibility:hidden'+(bgc!=""?';background-color:'+bgc+'':'')+';'+otherCSS+';" '+otherDIV+'>'+code+'</div>';}
function get_div(name){return new bw_check().ns4?document.layers[name]:document.all?document.all[name]:document.getElementById(name);}
function visDivNS(d,s){this.div(d).visibility=s?'show':'hide';}
function visDivDom(d,s){this.div(d).style.visibility=s?'visible':'hidden';}
function mEvent(m,node_index,e) {
	if (nn(window.CMenuHideTimers[m])) {
		window.clearTimeout(window.CMenuHideTimers[m]);
		window.CMenuHideTimers[m]=null;
	}
	switch (e){
		case "o": 
			window.CMenus[m].items[node_index].par.lvl.setA(node_index,1);
			if (window.CMenus[m].onmouseover) window.CMenus[m].onmouseover(window.CMenus[m].items[node_index]);
			break;
		case "c":
			if (window.CMenus[m].items[node_index].hc()) 
				window.CMenus[m].items[node_index].lvl.vis(!window.CMenus[m].items[node_index].lvl.v);
			else
				for (var i=0;i<window.CMenus[m].root.cd.length;i++) if (nn(window.CMenus[m].root.cd[i].lvl)) window.CMenus[m].root.cd[i].lvl.vis(0);
			if (window.CMenus[m].onclick) window.CMenus[m].onclick(window.CMenus[m].items[node_index]);
			break;
		case "t": 
			window.CMenuHideTimers[m]=setTimeout('window.CMenus["'+m+'"].hide()', und(window.CMenus[m].root.fmt.delay)?600:window.CMenus[m].root.fmt.delay);
			if (window.CMenus[m].onmouseout) window.CMenus[m].onmouseout(window.CMenus[m].items[node_index]);
			break;
	}
	return true;
}
window.oldCMOnLoad=window.onload;
function CMOnLoad(){
	var bw=new bw_check();
	if (bw.operaOld)window.operaResizeTimer=setTimeout('resizeHandler()',1000);
	if (typeof(window.oldCMOnLoad)=='function') window.oldCMOnLoad();
	if (bw.ns4) window.onresize=resizeHandler;
}
window.onload=new CMOnLoad();
function resizeHandler() {
	if (window.reloading) return;
	if (!window.origWidth){
		window.origWidth=window.innerWidth;
		window.origHeight=window.innerHeight;
	}
	var reload=window.innerWidth != window.origWidth || window.innerHeight != window.origHeight;
	window.origWidth=window.innerWidth;window.origHeight=window.innerHeight;
	if (window.operaResizeTimer)clearTimeout(window.operaResizeTimer);
	if (reload) {window.reloading=1;document.location.reload();return};
	if (new bw_check().operaOld){window.operaResizeTimer=setTimeout('resizeHandler()',500)};
}
function CMenuPopUp(menu, evn, offX, offY){window.CMenus[menu].mpopup(evn, offX, offY);}
function CMenuPopUpXY(menu,x,y){window.CMenus[menu].popup(x,y);}