Need help with javascript array

Hi all.  Thank you in advance.

First I create an array like this:

var myArray = [];

I have some objects that are keeping track of information for me.  I have created them as thus:

var x = {a: "someinfo", b: "some more info" myID: "ID0"}

Then I add it to an Array like this:

myArray.push(x);

I set x to null, and will use it again in the future to possibly add more objects to the array. All of my objects have the exact same structure, but of course have a different "myID"

This "seems" to work fine for me except when it comes time to pull the information for one of the objects out of the array. I try to get the index as follows:

var myX = searchArray(myArray, "ID0");

and my searchArray function looks like this:

searchArray : function(arr, toFind)
{
  if(arr.constructor != Array)
    {
    return -1;
    }
    for(var i = 0, len = arr.length; i < len; i++)
    {
      if(arr[i].myID == toFind)
      {
        return i;
      }
    }
return -2;
}

I thought this would loop through the array until it found a matching myID and then send that index back to me so I could use the index to pull the object from the array.  When I have multiple objects in the array, and I write out whet the myID "should" be, it always comes back as 'undefined'.  I don't understand this at all.  There are clearly as many objects in the array as I have added, and on another function, it will actually loop through and write the myID.

I am so confused, and not very good with javascript (obviously).

This shouldn't be this difficult.  Can anyone help?

Thank you.

Steve