/* Preload the images for close i-icon button */
var imgIicon_close = new Image();
imgIicon_close.src = "https://cisco.netacad.net/cnamsassets/images/common/btn_iicon_close.gif";

/*
 * Filename: /global.js
 * This file contains javascript functionality that are used throughout the CNAMS site.
 * This functionality includes:
 *  - Checking the browser and linking to the appropriate css file.
 *  - Workaround for Netscape 4 window resize bug.
 *  - Function for a small popup window
 *  - Function to do a custom form action
 *  - Functions to select/deselect all checkboxes
*/


// *** Start: Code for checking which CSS file to use ***
// get platform and browser versions
var platform = navigator.platform.substr(0,3);
var browserName = navigator.appName;
var browserVer;

//for IE 5, the first number in "navigator.appVersion" is 4.0, so need to parse the string further 
if (navigator.appVersion.indexOf('MSIE 5') != -1) {
  browserVer=5;
}
else {
  browserVer = parseInt(navigator.appVersion);
}

// Platform is Windows
if (platform=="Win") {

  //Netscape 4 on Windows
  if ((browserName=="Netscape") && (browserVer <=4)) {  
    document.write('<link rel="stylesheet" type="text/css" href="/pc_ie_en.css" >');
    
  }
  //IE, NS6, (or any other browsers) on Windows 
  else {

    document.write('<link rel="stylesheet" type="text/css" href="/pc_ie_en.css" >');
  }
} 
  
// Platform is Macintosh
else if (platform=="Mac") {

  //IE5 or NS6 on Mac
  if (browserVer >=5) {
    document.write('<link rel="stylesheet" type="text/css" href="/pc_ie_en.css" >');
  }
    
  //Netscape 4, IE4, and all other browsers on Mac
  else {
    document.write('<link rel="stylesheet" type="text/css" href="/pc_ie_en.css" >');
  }
} 

// All other platforms
else {

  document.write('<link rel="stylesheet" type="text/css" href="/pc_ie_en.css" >');
}

// *** End: Code for checking which CSS file to use ***


// *** START: Code for Netscape 4 Resize bug ***
// This is a workaround for a Netscape 4 bug that causes 
// stylesheets to be corrupted when the window is resized.
if (document.layers) {
  var widthCheck = window.innerWidth;
  var heightCheck = window.innerHeight;
  window.onResize = resizeFix;
}

function resizeFix() {
  if (widthCheck != window.innerWidth || heightCheck != window.innerHeight)
  document.location.href = document.location.href;
}

// *** End: Code for Netscape 4 Resize bug ***


// *** START: Code for Opening a new browser popup window ***
// This function is used to open a new small browser window. 
// USAGE: 
//    <a href="javascript:openPopupWin('viewcurriculluminfo.shtml');">View Curriculum Information</a>
//
function openPopupWin(URL) {
  newPopupWin = window.open(URL,'popup','width=643,height=468,scrollbars,resizable=yes');
}
function openPopupWinByName(URL, winName) {
  newPopupWin = window.open(URL,winName,'width=660,height=480,scrollbars,resizable=yes,toolbar=yes');
}
function openLoginPopup(URL) {
  newLoginPopup = window.open(URL,'popup','width=205,height=205,screenX=450,screenY=450,left=550,top=300,resizable=no,status=no,toolbar=no,scrollbars=no');
}
// *** End: Code for Opening a new browser popup window ***


// *** START: Custom form action function ***
// This function is used to change the action URL ('theUrl') for 'theForm'. 
// It is used on pages where there is one form, but different buttons trigger different actions. 
// Arguments: 'theForm' is the name of the form containing the buttons.
//        'the Url' is the URL of the action template associated with the button.
// USAGE: 
//    <input type="button" name="cancel2" value="Cancel" class="button" onClick="doFormAction(this.form,'contacts.jhtml');" />
//
function doFormAction(theForm, theUrl) {
  eval('theForm.action=\"' + theUrl + '\"');
  eval('theForm.submit()');
  }
// *** END: Custom form action function ***

// *** START: Functions to select/deselect all checkboxes ***
// This function is used to check or uncheck all the checkboxes names of which are provided in an array
// Arguments: 'formname' is the name of the form containing the buttons.
//        'the Url' is the URL of the action template associated with the button.
// USAGE: 
//    <input type="button" name="cancel2" value="Cancel" class="button" onClick="doFormAction('contactFrm','contacts.jhtml');" />
//

function SelectAll(formName,getArr,whattodo) {
  getArr = eval(getArr);
  
  if (whattodo == "check") {
    for (var i=0;i<getArr.length;i++) {
    myBox = getArr[i];
    var e = eval("document." + formName + "." + myBox);
    e.checked = true;
    }
  }
  else {
    for (var i=0;i<getArr.length;i++) {
    myBox = getArr[i];
    var e = eval("document." + formName + "." + myBox);
    e.checked = false;
  }     
}
}
// *** END: Functions to select/deselect all checkboxes ***



// Get the BaseTag, if specified in the current page
function get_baseTag() {
  var baseTag = "";
  if ( document.all ) { 
    var baseTagsCol = document.all.tags("BASE");
    if (baseTagsCol.length!=0){
      baseTag = baseTagsCol[0].href;
    }
  } else if (window.opera) {
    var baseTag
    if (document.getElementById('basehref')){
      baseTag = document.getElementById('basehref').href;
      baseTag = baseTag.substring(0, baseTag.length-1);
    }
  }
  return baseTag;
}

// Drop-down location.href redirection
function dropdown_redirect(select_name,reset) {
  if (reset == null) { reset = true };
  var theselect=eval(select_name);
  var tmp=theselect.selectedIndex;
  if (reset) { theselect.options[0].selected=true; }
  if(theselect.options[tmp].value != "") {
    location.href=get_baseTag()+theselect.options[tmp].value;
  }
}

// Area drop-down redirection
var areanav_current = 0;
function set_areanav_current( index ) {
  // xsl position starts at 1, array index starts at 0
  areanav_current = index-1;
}
function areanav_redirect(select_name) {  
  var theselect=eval(select_name);
  var tmp=theselect.selectedIndex;
  if(theselect.options[tmp].value != "") {
   theselect.options[areanav_current].selected=true;
   location.href=get_baseTag()+theselect.options[tmp].value;
  }
}
  // Rollover Images
      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_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_findObj(n, d) { //v4.0
    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 && document.getElementById) x=document.getElementById(n); return x;
  }

  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];}
  }


// Constant to check if DHTML is supported.
var DHTML = (document.getElementById || document.all || document.layers);

// Get an element by ID
function getObj(name)
{
  var obj;
  if (document.getElementById)
    {
      obj = document.getElementById(name);
      if (obj) return obj;
    }
  else if (document.all)
    {
      obj = document.all[name];
      if (obj) return obj;
    }
  else if (document.layers)
    {
      return document.layers[name];
    }
}