my javascript problamatic in IE

[orkun]

hello

my javascript doesn't run in IE but runs in firefox.

what should I do to make it run in IE ?

Do you have any suggestion ?
<script type="text/javascript">
var xoffset = 0;
var yoffset = 0;

var width;
height;

var xx;
var yy;

function first() {

// Burada bir alert 'Burday?m gibi'

if (document.getElementById) {
img = document.getElementById('harita:imgMap');
if (img.style) {

xoffset = img.style.left;
yoffset = img.style.top;

return;

} else {
alert('hata first: img.style');
}

} else {
alert('hata first first:document.getElementById');
}

if (document.all) {
imgall = document.all['harita:imgMap'];
if (imgall.style) {

xoffset = imgall.style.left;
yoffset = imgall.style.top;
return;

} else {
alert('hata first: imgall.style');
}

}
// return ???
}

function startRubber(evt) {

// Burada bir alert 'Burday?m gibi'

first();

var myReference = null;
if (document.getElementById) { // buras? firefox a uyar Ya explorer
myReference = document.getElementById('harita:rubberBand');

} else {
alert('hata startRubber:document.getElementById');
}
if (myReference.style) {
//DOM & proprietary DOM
myReference.style.width = 0;
myReference.style.height = 0;
myReference.style.left = (evt.clientX) + 'px';
myReference.style.top = (evt.clientY) + 'px';

myReference.style.visibility = 'visible';

var xx = new Number(evt.clientX - parseInt(xoffset));
var yy = new Number(evt.clientY - parseInt(yoffset));

xx = xx.toFixed(3);
yy = yy.toFixed(3);

upperleft_koord(xx, yy);

} else {
alert(' hata startRubber:myReference.style');
}
document.onmousemove = moveRubber;

return;

}

function moveRubber(evt) {

if (document.getElementById) { // buras? firefox a uyar // explorer ???
myReference = document.getElementById('harita:rubberBand');
myReference.style.width = (evt.clientX - parseInt(myReference.style.left)) + 'px';
myReference.style.height = (evt.clientY - parseInt(myReference.style.top)) + 'px';

width = parseInt(myReference.style.width);
height = parseInt(myReference.style.height);

} else {
alert(' hata moveRubber document.getElementById');
}

myReference.onmouseup = stopRubber;

return;
} //moveRubber

function stopRubber() {
myReference.style.visibility = 'hidden';
myReference = null;
document.onmousemove = null;
if (document.getElementById('harita:rect_zoom')) {
document.getElementById('harita:rect_zoom').value = '0';
document.getElementById('harita:zoom_rect').src = './images/zoom_rect.png';

} else {
alert('hata stopRubber() document.getElementById(harita:rect_zoom ');
}

width_height(width, height);
return;
//document.forms['harita'].submit();
} //stopRubber

//document.onmousedown = startRubber;
//document.onmouseup = stopRubber;

function koord_click(event) {
first();
fm = 'harita';
img = document.getElementById(fm + ':harita1');

if (img) {
xx = 0;
yy = 0;
xx = event.clientX - parseInt(xoffset);
yy = event.clientY - parseInt(yoffset); // bu de?erler de?i?ebilir
xx = xx.toFixed(3);
yy = yy.toFixed(3);

document.getElementById(fm + ':img_clicked').value = '1';

img_clickxy(xx, yy);

if (document.getElementById('harita:info_in').value == '1') {
document.getElementById('harita:info_in').value == '0'
javascript: Richfaces.showModalPanel('harita:infomodalPanel');
}

return;

} else {
alert(' img tan?ms?z' + img);
}

} //koord_click

function zoom_rect() {

if (document.getElementById) {

document.getElementById('harita:zoom_rect').src = './images/zoom_rect_gray.png';

if (document.getElementById('harita:rect_zoom').value == '0') {
document.getElementById('harita:rect_zoom').value = '1';
document.getElementById('harita:info_in').value = '0';
document.getElementById('harita:infobutton').src = './images/Info24.png';
}
return;
} else {
alert('hata zoom_rect() document.getElementById tan?ms?z');
}

return;
}
</script>