Firefox no properties for document.images?

[Palko17]

I merged my earlier posted script with another script, the AJAX works now, but it won't change the images to the correct src... I have no idea what JS's problem is, but it's got serious ones...


var offsetx=0;
var offsety=0;

function getKey(e, thisoffsetx, thisoffsety, firstx, firsty) {

var firstx=offsetx+firstx;
var firsty=offsety+firsty;

if (e.keyCode=='38') {

for (var y=1; y<=17; y++) {

thisfirstx=firstx;

for (var x=1; x<=20; x++) {
thisfirstx++;

if (window.XMLHttpRequest) {
myRequest = new XMLHttpRequest();
} else if (window.ActiveXObject) {
myRequest = new ActiveXObject("Microsoft.XMLHTTP");
}

myRequest.onreadystatechange = function() {

if (myRequest.readyState == 4) {

var thisimageid="mapTile"+x+"_"+y;

var imageLink="*********"+myRequest.responseText;

document.thisimageid.src=imageLink;

}

}

myRequest.open('GET', '************?x=' + thisfirstx + '&y=' + firsty + '&direction=up', true);
myRequest.send(null);

}

firsty++;

}

offsety= thisoffsety-1;

}

}