mod/hotpot/template/v6/hp6utilities.js_

   1 //GENERAL UTILITY FUNCTIONS AND VARIABLES
   2
   3 //PAGE DIMENSION FUNCTIONS
   4 function PageDim(){
   5 //Get the page width and height
   6         this.W = 600;
   7         this.H = 400;
   8         this.W = document.getElementsByTagName('body')[0].clientWidth;
   9         this.H = document.getElementsByTagName('body')[0].clientHeight;
  10 }
  11
  12 var pg = null;
  13
  14 function GetPageXY(El) {
  15         var XY = {x: 0, y: 0};
  16         while(El){
  17                 XY.x += El.offsetLeft;
  18                 XY.y += El.offsetTop;
  19                 El = El.offsetParent;
  20         }
  21         return XY;
  22 }
  23
  24 function GetScrollTop(){
  25         if (typeof(window.pageYOffset) == 'number'){
  26                 return window.pageYOffset;
  27         }
  28         else{
  29                 if ((document.body)&&(document.body.scrollTop)){
  30                         return document.body.scrollTop;
  31                 }
  32                 else{
  33                         if ((document.documentElement)&&(document.documentElement.scrollTop)){
  34                                 return document.documentElement.scrollTop;
  35                         }
  36                         else{
  37                                 return 0;
  38                         }
  39                 }
  40         }
  41 }
  42
  43 function GetViewportHeight(){
  44         if (typeof window.innerHeight != 'undefined'){
  45                 return window.innerHeight;
  46         }
  47         else{
  48                 if (((typeof document.documentElement != 'undefined')&&(typeof document.documentElement.clientHeight !=
  49      'undefined'))&&(document.documentElement.clientHeight != 0)){
  50                         return document.documentElement.clientHeight;
  51                 }
  52                 else{
  53                         return document.getElementsByTagName('body')[0].clientHeight;
  54                 }
  55         }
  56 }
  57
  58 function TopSettingWithScrollOffset(TopPercent){
  59         var T = Math.floor(GetViewportHeight() * (TopPercent/100));
  60         return GetScrollTop() + T;
  61 }
  62
  63 //CODE FOR AVOIDING LOSS OF DATA WHEN BACKSPACE KEY INVOKES history.back()
  64 var InTextBox = false;
  65
  66 function SuppressBackspace(e){
  67         if (InTextBox == true){return;}
  68         if (C.ie) {
  69                 thisKey = window.event.keyCode;
  70         }
  71         else {
  72                 thisKey = e.keyCode;
  73         }
  74
  75         var Suppress = false;
  76
  77         if (thisKey == 8) {
  78                 Suppress = true;
  79         }
  80
  81         if (Suppress == true){
  82                 if (C.ie){
  83                         window.event.returnValue = false;
  84                         window.event.cancelBubble = true;
  85                 }
  86                 else{
  87                         e.preventDefault();
  88                 }
  89         }
  90 }
  91
  92 if (C.ie){
  93         document.attachEvent('onkeydown',SuppressBackspace);
  94         window.attachEvent('onkeydown',SuppressBackspace);
  95 }
  96 else{
  97         if (window.addEventListener){
  98                 window.addEventListener('keypress',SuppressBackspace,false);
  99         }
 100 }
 101
 102 function ReduceItems(InArray, ReduceToSize){
 103         var ItemToDump=0;
 104         var j=0;
 105         while (InArray.length > ReduceToSize){
 106                 ItemToDump = Math.floor(InArray.length*Math.random());
 107                 InArray.splice(ItemToDump, 1);
 108         }
 109 }
 110
 111 function Shuffle(InArray){
 112         var Num;
 113         var Temp = new Array();
 114         var Len = InArray.length;
 115
 116         var j = Len;
 117
 118         for (var i=0; i<Len; i++){
 119                 Temp[i] = InArray[i];
 120         }
 121
 122         for (i=0; i<Len; i++){
 123                 Num = Math.floor(j  *  Math.random());
 124                 InArray[i] = Temp[Num];
 125
 126                 for (var k=Num; k < (j-1); k++) {
 127                         Temp[k] = Temp[k+1];
 128                 }
 129                 j--;
 130         }
 131         return InArray;
 132 }
 133
 134 function WriteToInstructions(Feedback) {
 135         document.getElementById('InstructionsDiv').innerHTML = Feedback;
 136 [inclPreloadImages]
 137         RefreshImages();
 138 [/inclPreloadImages]
 139 }
 140
 141
 142 [inclPreloadImages]
 143 Imgs = new Array();
 144
 145 function PreloadImages(){
 146         var a = PreloadImages.arguments;
 147         for (var i=0; i<a.length; i++){
 148                 Imgs[i] = new Image();
 149                 Imgs[i].src = a[i];
 150         }
 151 }
 152
 153 function RefreshImages(){
 154         for (var i=0; i<document.images.length; i++){
 155                 if (document.images[i].name.substring(0,6) != 'NavBar'){
 156                         document.images[i].src = document.images[i].src;
 157                 }
 158         }
 159 }
 160 [/inclPreloadImages]
 161
 162 function EscapeDoubleQuotes(InString){
 163         return InString.replace(/"/g, '&quot;')
 164 }
 165
 166 function TrimString(InString){
 167         var x = 0;
 168
 169         if (InString.length != 0) {
 170                 while ((InString.charAt(InString.length - 1) == '\u0020') || (InString.charAt(InString.length - 1) == '\u000A') || (InString.charAt(InString.length - 1) == '\u000D')){
 171                         InString = InString.substring(0, InString.length - 1)
 172                 }
 173
 174                 while ((InString.charAt(0) == '\u0020') || (InString.charAt(0) == '\u000A') || (InString.charAt(0) == '\u000D')){
 175                         InString = InString.substring(1, InString.length)
 176                 }
 177
 178                 while (InString.indexOf('  ') != -1) {
 179                         x = InString.indexOf('  ')
 180                         InString = InString.substring(0, x) + InString.substring(x+1, InString.length)
 181                  }
 182
 183                 return InString;
 184         }
 185
 186         else {
 187                 return '';
 188         }
 189 }
 190
 191 function FindLongest(InArray){
 192         if (InArray.length < 1){return -1;}
 193
 194         var Longest = 0;
 195         for (var i=1; i<InArray.length; i++){
 196                 if (InArray[i].length > InArray[Longest].length){
 197                         Longest = i;
 198                 }
 199         }
 200         return Longest;
 201 }
 202
 203 //UNICODE CHARACTER FUNCTIONS
 204 function IsCombiningDiacritic(CharNum){
 205         var Result = (((CharNum >= 0x0300)&&(CharNum <= 0x370))||((CharNum >= 0x20d0)&&(CharNum <= 0x20ff)));
 206         Result = Result || (((CharNum >= 0x3099)&&(CharNum <= 0x309a))||((CharNum >= 0xfe20)&&(CharNum <= 0xfe23)));
 207         return Result;
 208 }
 209
 210 function IsCJK(CharNum){
 211         return ((CharNum >= 0x3000)&&(CharNum < 0xd800));
 212 }
 213
 214 //SETUP FUNCTIONS
 215 //BROWSER WILL REFILL TEXT BOXES FROM CACHE IF NOT PREVENTED
 216 function ClearTextBoxes(){
 217         var NList = document.getElementsByTagName('input');
 218         for (var i=0; i<NList.length; i++){
 219                 if ((NList[i].id.indexOf('Guess') > -1)||(NList[i].id.indexOf('Gap') > -1)){
 220                         NList[i].value = '';
 221                 }
 222                 if (NList[i].id.indexOf('Chk') > -1){
 223                         NList[i].checked = '';
 224                 }
 225         }
 226 }
 227
 228 //EXTENSION TO ARRAY OBJECT
 229 function Array_IndexOf(Input){
 230         var Result = -1;
 231         for (var i=0; i<this.length; i++){
 232                 if (this[i] == Input){
 233                         Result = i;
 234                 }
 235         }
 236         return Result;
 237 }
 238 Array.prototype.indexOf = Array_IndexOf;
 239
 240 //IE HAS RENDERING BUG WITH BOTTOM NAVBAR
 241 function RemoveBottomNavBarForIE(){
 242         if ((C.ie)&&(document.getElementById('Reading') != null)){
 243                 if (document.getElementById('BottomNavBar') != null){
 244                         document.getElementById('TheBody').removeChild(document.getElementById('BottomNavBar'));
 245                 }
 246         }
 247 }
 248