JS: loading textures on start up

ok..... last one(I hope.) I'm trying very hard to follow the
documentation here. I hope this isn't something stupid because I
really feel bad asking for so much help.

the problem here, is that it takes 3 tries to get a texture loaded in
jit.js. in max it appears that jit.gl.texture makes max wait until
its done loading the file. but in javascript, it lets JS executing
the code. any work arounds for this?

///////////////////////////MAX

////////////////NAME THIS testTexture.js
autowatch=1;

var changeMeToAValidImagePath = "moooooooo"
var myrender = null;
var dirtTexture =null
var background = null
var myrender = new JitterObject("jit.gl.render","zoe");

function loadbang()
    {
    post("begin loadbang--n");
    dirtTexture = new JitterObject("jit.gl.texture","zoe")
    dirtTexture.name = "dirt"
    dirtTexture.file = changeMeToAValidImagePath
    post("dirtTexture.dim AFTER dirtTexture.file
assignment: ,",dirtTexture.dim,"n");

    background = new JitterObject("jit.gl.gridshape","zoe")
    background.shape = "plane"
    background.texture = "dirt";

    draw();
    }

function draw()
{
myrender.erase();
myrender.drawclients();
myrender.swap();
}