jquery split() and indexOf results in “Object doesn't support this property or method”

Question

I have the following code:

var selected = $(\'#hiddenField\').val().split(\",\");
...
if (selected.indexOf(id) > 0) {
   ... set value ...
}

Answer 1

Based on your error message, I'm assuming this is coming from Internet Explorer.

Surprise! Internet Explorer (including version 8) does not support indexOf for arrays.

Here is Firefox's implementation you can use:

if (!Array.prototype.indexOf)
{
  Array.prototype.indexOf = function(elt /*, from*/)
  {
    var len = this.length >>> 0;

    var from = Number(arguments[1]) || 0;
    from = (from < 0)
         ? Math.ceil(from)
         : Math.floor(from);
    if (from < 0)
      from += len;

    for (; from < len; from++)
    {
      if (from in this &&
          this[from] === elt)
        return from;
    }
    return -1;
  };
}