How to get a string's order number in an array in Javascript?
===

Here's an array:

    var array = new Array();
    array[0] = "sound1.mp3"
    array[1] = "sound2.mp3"
    array[2] = "sound3.mp3"

In a function that I've written, I need to get the string's order number.

Here's what I've got so far:

    function registerSound(array, i) {
    	var arrno = ???;
    	var arrurl = array[i];
    	
    	soundManager.createSound({ id: 'sound' + arrno, url: arrurl });
    }
    
    function processArray(array) {;
    	for(i=1; i<array.length; i++) {
    	     registerSound(array, i);
    	}
    }

The `arrno` variable should have the order number of `"sound2.mp3"` (in this case `1`). It needs to be set up so that, when the `for` statement turns to the next string in the array, the `arrno` variable will contain the order number of `"sound3.mp3"` (2).

Thanks very much in advance!

