javascript assign variable value to checkbox status in html page

I am very new to javascript, and this seems like a very simple problem but despite many similar posts none seem to point to a solution for me.

I have the following code in a script of an html page:

$.get( "data.php", { getlocks: 1}, function( data ) { //Pull checkbox status from database (so it isn't lost on a page refresh)
    wl = data.split(" ");
    document.getElementById("lock369").checked = 1;
    document.getElementById("lock399").checked = 0;
    document.getElementById("lock935").checked = wl[2];
    document.getElementById("test1").value = wl[0];
    document.getElementById("test2").value = wl[1];
    document.getElementById("test3").value = wl[2];
});

Where "lock369" and "lock935" are set to constants just for my sanity to ensure the page is loading properly. The problem is no matter how I setup "lock935" it comes out as checked even when wl[2] is zero. (I have text boxes "test1" - "test3" displaying the 3 elements of wl so I am sure they are getting the correct values from the database they're pulled from, via data.php).

Originally I had all three checkboxes set to their respective elements of wl and the same issue occurs for all of them so it's not something funny with only "lock935". I have also tried assigning the values of wl to individual variables and setting document.getElementById("lockXXX").checked equal to those variables, this didn't solve the issue. I also tried putting wl[X] in paranthesis, quotes, single quotes, etc. and nothing made a difference.

As I mentioned I'm very new to js so if this is a simple negligence on my part just kindly yell at me for it and I'll correct my ways in the future :)

Thanks!