+ if (data == '' || data == null){
+ return '';
+ }
+ // http://stackoverflow.com/questions/2596483/unicode-and-uri-encoding-decoding-and-escaping-in-javascript
+ function nibble_to_hex(nibble){
+ var chars = '0123456789ABCDEF';
+ return chars.charAt(nibble);
+ }
+ data = data.toString();
+ var buffer = '';
+ for(var i=0; i<data.length; i++){
+ var c = data.charCodeAt(i);
+ var bs = new Array();
+ if (c > 0x10000){
+ // 4 bytes
+ bs[0] = 0xF0 | ((c & 0x1C0000) >>> 18);
+ bs[1] = 0x80 | ((c & 0x3F000) >>> 12);
+ bs[2] = 0x80 | ((c & 0xFC0) >>> 6);
+ bs[3] = 0x80 | (c & 0x3F);
+ }else if (c > 0x800){
+ // 3 bytes
+ bs[0] = 0xE0 | ((c & 0xF000) >>> 12);
+ bs[1] = 0x80 | ((c & 0xFC0) >>> 6);
+ bs[2] = 0x80 | (c & 0x3F);
+ }else if (c > 0x80){
+ // 2 bytes
+ bs[0] = 0xC0 | ((c & 0x7C0) >>> 6);
+ bs[1] = 0x80 | (c & 0x3F);
+ }else{
+ // 1 byte
+ bs[0] = c;
+ }
+ for(var j=0; j<bs.length; j++){
+ var b = bs[j];
+ var hex = nibble_to_hex((b & 0xF0) >>> 4)
+ + nibble_to_hex(b &0x0F);
+ buffer += '%'+hex;
+ }
+ }
+ return buffer;
+