- "use strict";
- var utils = {
- getGUID: function() {
- function s4() {
- return Math.floor((1 + Math.random()) * 0x10000)
- .toString(16)
- .substring(1);
- }
- return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
- s4() + '-' + s4() + s4() + s4();
- },
- indexOf: function(array, searchElement, fromIndex) {
- if (Array.prototype.indexOf) {
- return array.indexOf(searchElement, fromIndex);
- } else {
- var k;
- var O = Object(array);
- // 2. Let lenValue be the result of calling the Get
- // internal method of O with the argument "length".
- // 3. Let len be ToUint32(lenValue).
- var len = O.length >>> 0;
- // 4. If len is 0, return -1.
- if (len === 0) {
- return -1;
- }
- // 5. If argument fromIndex was passed let n be
- // ToInteger(fromIndex); else let n be 0.
- var n = +fromIndex || 0;
- if (Math.abs(n) === Infinity) {
- n = 0;
- }
- // 6. If n >= len, return -1.
- if (n >= len) {
- return -1;
- }
- // 7. If n >= 0, then Let k be n.
- // 8. Else, n<0, Let k be len - abs(n).
- // If k is less than 0, then let k be 0.
- k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
- // 9. Repeat, while k < len
- while (k < len) {
- var kValue;
- // a. Let Pk be ToString(k).
- // This is implicit for LHS operands of the in operator
- // b. Let kPresent be the result of calling the
- // HasProperty internal method of O with argument Pk.
- // This step can be combined with c
- // c. If kPresent is true, then
- // i. Let elementK be the result of calling the Get
- // internal method of O with the argument ToString(k).
- // ii. Let same be the result of applying the
- // Strict Equality Comparison Algorithm to
- // searchElement and elementK.
- // iii. If same is true, return k.
- if (k in O && O[k] === searchElement) {
- return k;
- }
- k++;
- }
- return -1;
- }
- },
- // from http://ejohn.org/projects/flexible-javascript-events/
- addEvent: function( obj, type, fn ) {
- if ( obj.attachEvent ) {
- obj['e'+type+fn] = fn;
- obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
- obj.attachEvent( 'on'+type, obj[type+fn] );
- } else
- obj.addEventListener( type, fn, false );
- },
- // from http://ejohn.org/projects/flexible-javascript-events/
- removeEvent: function( obj, type, fn ) {
- if ( obj.detachEvent ) {
- obj.detachEvent( 'on'+type, obj[type+fn] );
- obj[type+fn] = null;
- } else
- obj.removeEventListener( type, fn, false );
- }
- };
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