Decoder = {
   isEmpty : function(val){
      if(val){
         return ((val===null) || val.length==0 || /^\s+$/.test(val));
      }else{
         return true;
      }
   },
   // Convert HTML entities into numerical entities
   HTML2Numerical : function(s){
      var arr1 = new Array(' ','¡','¢','£','¤','¥','¦','§','¨','©','ª','«','¬','­','®','¯','°','±','²','³','´','µ','¶','·','¸','¹','º','»','¼','½','¾','¿','à','á','â','ã','Ä','å','æ','ç','è','é','ê','ë','ì','í','î','ï','ð','ñ','ò','ó','ô','õ','Ö','×','ø','ù','ú','û','Ü','ý','þ','ß','à','á','â','ã','ä','å','æ','ç','è','é','ê','ë','ì','í','î','ï','ð','ñ','ò','ó','ô','õ','ö','÷','Ø','ù','ú','û','ü','ý','þ','ÿ','"','&','<','>','œ','œ','š','š','ÿ','ˆ','˜',' ',' ',' ','‌','‍','‎','‏','–','—','‘','’','‚','“','”','„','†','†','‰','‹','›','€','ƒ','α','β','γ','δ','ε','ζ','η','θ','ι','κ','λ','μ','ν','ξ','ο','π','ρ','σ','τ','υ','φ','χ','ψ','ω','α','β','γ','δ','ε','ζ','η','θ','ι','κ','λ','μ','ν','ξ','ο','π','ρ','ς','σ','τ','υ','φ','χ','ψ','ω','ϑ','ϒ','ϖ','•','…','′','′','‾','⁄','℘','ℑ','ℜ','™','ℵ','←','↑','→','↓','↔','↵','←','↑','→','↓','↔','∀','∂','∃','∅','∇','∈','∉','∋','∏','∑','−','∗','√','∝','∞','∠','∧','∨','∩','∪','∫','∴','∼','≅','≈','≠','≡','≤','≥','⊂','⊃','⊄','⊆','⊇','⊕','⊗','⊥','⋅','⌈','⌉','⌊','⌋','⟨','⟩','◊','♠','♣','♥','♦');
      var arr2 = new Array(' ','¡','¢','£','¤','¥','¦','§','¨','©','ª','«','¬','­','®','¯','°','±','²','³','´','µ','¶','·','¸','¹','º','»','¼','½','¾','¿','À','Á','Â','Ã','Ä','Å','Æ','Ç','È','É','Ê','Ë','Ì','Í','Î','Ï','Ð','Ñ','Ò','Ó','Ô','Õ','Ö','×','Ø','Ù','Ú','Û','Ü','Ý','Þ','ß','à','á','â','ã','ä','å','æ','ç','è','é','ê','ë','ì','í','î','ï','ð','ñ','ò','ó','ô','õ','ö','÷','ø','ù','ú','û','ü','ý','þ','ÿ','"','&','<','>','Œ','œ','Š','š','Ÿ','ˆ','˜',' ',' ',' ','‌','‍','‎','‏','–','—','‘','’','‚','“','”','„','†','‡','‰','‹','›','€','ƒ','Α','Β','Γ','Δ','Ε','Ζ','Η','Θ','Ι','Κ','Λ','Μ','Ν','Ξ','Ο','Π','Ρ','Σ','Τ','Υ','Φ','Χ','Ψ','Ω','α','β','γ','δ','ε','ζ','η','θ','ι','κ','λ','μ','ν','ξ','ο','π','ρ','ς','σ','τ','υ','φ','χ','ψ','ω','ϑ','ϒ','ϖ','•','…','′','″','‾','⁄','℘','ℑ','ℜ','™','ℵ','←','↑','→','↓','↔','↵','⇐','⇑','⇒','⇓','⇔','∀','∂','∃','∅','∇','∈','∉','∋','∏','∑','−','∗','√','∝','∞','∠','∧','∨','∩','∪','∫','∴','∼','≅','≈','≠','≡','≤','≥','⊂','⊃','⊄','⊆','⊇','⊕','⊗','⊥','⋅','⌈','⌉','⌊','⌋','〈','〉','◊','♠','♣','♥','♦');
      return this.swapArrayVals(s,arr1,arr2);
   },

   // Numerically encodes all unicode characters
   numEncode : function(s){

      if(this.isEmpty(s)) return "";

      var e = "";
      for (var i = 0; i < s.length; i++)
      {
         var c = s.charAt(i);
         if (c < " " || c > "~")
         {
            c = "&#" + c.charCodeAt() + ";";
         }
         e += c;
      }
      return e;
   },

   // HTML Decode numerical and HTML entities back to original values
   htmlDecode : function(s){

      var c,m,d = s;

      if(this.isEmpty(d)) return "";

      // convert HTML entites back to numerical entites first
      d = this.HTML2Numerical(d);

      // look for numerical entities &#34;
      arr=d.match(/&#[0-9]{1,5};/g);

      // if no matches found in string then skip
      if(arr!=null){
         for(var x=0;x<arr.length;x++){
            m = arr[x];
            c = m.substring(2,m.length-1); //get numeric part which is refernce to unicode character
            // if its a valid number we can decode
            if(c >= -32768 && c <= 65535){
               // decode every single match within string
               d = d.replace(m, String.fromCharCode(c));
            }else{
               d = d.replace(m, ""); //invalid so replace with nada
            }
         }
      }

      return d;
   },

   // Encodes the basic 4 characters used to malform HTML in XSS hacks
   XSSEncode : function(s,en){
      if(!this.isEmpty(s)){
         en = en || true;
         // do we convert to numerical or html entity?
         if(en){
            s = s.replace(/\'/g,"&#39;"); //no HTML equivalent as &apos is not cross browser supported
            s = s.replace(/\"/g,"&quot;");
            s = s.replace(/</g,"&lt;");
            s = s.replace(/>/g,"&gt;");
         }else{
            s = s.replace(/\'/g,"&#39;"); //no HTML equivalent as &apos is not cross browser supported
            s = s.replace(/\"/g,"&#34;");
            s = s.replace(/</g,"&#60;");
            s = s.replace(/>/g,"&#62;");
         }
         return s;
      }else{
         return "";
      }
   },

   // returns true if a string contains html or numerical encoded entities
   hasEncoded : function(s){
      if(/&#[0-9]{1,5};/g.test(s)){
         return true;
      }else if(/&[A-Z]{2,6};/gi.test(s)){
         return true;
      }else{
         return false;
      }
   },

   // will remove any unicode characters
   stripUnicode : function(s){
      return s.replace(/[^\x20-\x7E]/g,"");

   },

   // corrects any double encoded &amp; entities e.g &amp;amp;
   correctEncoding : function(s){
      return s.replace(/(&amp;)(amp;)+/,"$1");
   },


   // Function to loop through an array swaping each item with the value from another array e.g swap HTML entities with Numericals
   swapArrayVals : function(s,arr1,arr2){
      if(this.isEmpty(s)) return "";
      var re;
      if(arr1 && arr2){
         //ShowDebug("in swapArrayVals arr1.length = " + arr1.length + " arr2.length = " + arr2.length)
         // array lengths must match
         if(arr1.length == arr2.length){
            for(var x=0,i=arr1.length;x<i;x++){
               re = new RegExp(arr1[x], 'g');
               s = s.replace(re,arr2[x]); //swap arr1 item with matching item from arr2
            }
         }
      }
      return s;
   },

   inArray : function( item, arr ) {
      for ( var i = 0, x = arr.length; i < x; i++ ){
         if ( arr[i] === item ){
            return i;
         }
      }
      return -1;
   }
}