fix-ie5.js扩展在IE5下不能使用的几个方法_应用技巧

fix-ie5.js扩展在IE5下不能使用的几个方法_应用技巧

// fix Function.apply
  if (!Function.apply) {
    var APPLY = "apply-" + Number(new Date);
    $$apply = function(f, o, a) {
      var r;
      o[APPLY] = f;
      switch (a.length) { // deconstruct for speed
        case 0: r = o[APPLY](); break;
        case 1: r = o[APPLY](a[0]); break;
        case 2: r = o[APPLY](a[0], a[1]); break;
        case 3: r = o[APPLY](a[0], a[1], a[2]); break;
        case 4: r = o[APPLY](a[0], a[1], a[2], a[3]); break;
        default:
          var aa = [], i = a.length - 1;
          do aa[i] = "a[" + i + "]"; while (i--);
          eval("r=o[APPLY](" + aa + ")");
      }
      delete o[APPLY];
      return r;
    };
    // fix ICommon
    ICommon.valueOf.prototype.inherit = function() {
      return $$apply(arguments.callee.caller.ancestor, this, arguments);
    };
  }