For in not working in IE7

Hey guys,
I do all my coding in FF and then check things out and bug fix in IE, i had some code that worked great on IE6 but is broken in IE7 heres the code:


function updateMenu(mytype, partid) {
try {
var i, myarray;
var price, difference;
var myarray = Parts[mytype];

// No need to look up which index the part has since we use the id itself.
// Calculate differences
var numKeys=0 // Let's see if there's more than one option, since the .length property won't be useable.
for(var i in myarray){
numKeys++
if(numKeys>1){break}
}
if(numKeys==0){
return // Uh, no parts?
}
else if(numKeys==1){
if(document.all) {
document.all[mytype].checked = true;
document.all[mytype].className = 'customizedisabled';
}
else if(document.getElementById) {
document.getElementById(mytype).checked = true;
document.getElementById(mytype).className = 'customizedisabled';
}
}
else {
for(var i in myarray) { // Now we must use for...in since the index range is not from 0 to n, but has holes.

price = "";
if(i != partid) { // Don't calculate difference for selected item (the difference is 0)
difference = myarray[i] / priceMask - myarray[partid] / priceMask;
if(difference > 0) price = " [+" + difference + "]";
else price = " [" + difference + "]";

}
if(document.all) {
document.all['pd' + i + mytype].innerHTML = price;
}
else if(document.getElementById) {
document.getElementById('pd' + i + mytype).innerHTML = price;
}
}
}
}
catch(er) {
}
}


Whats going on is that IE is breaking on the for(var i in myarray) loops, it runs throught the loop however i is always empty. I verified that the myarray variable is getting its data correctly by doing alert(myarray.length); and it is returning as expected.

Any ideas why the for in would be breaking?

*bump*

if(document.all) {
document.all[mytype].checked = true;
document.all[mytype].className = 'customizedisabled';
}
else if(document.getElementById) {
document.getElementById(mytype).checked = true;
document.getElementById(mytype).className = 'customizedisabled';
}


Use the same code for FF and IE.
IE knows the command getElementById.

Also, What's Parts? Maybe the error comes from there.

Parts is an Array set outside the function looks like this:

var priceMask = 702343;
var basePrice = 1865;
var baseDiscount = 0.00;
var Parts = new Array();
var PartNames = new Array();
Parts[30] = new Array();
Parts[30][105] = 24582005;
PartNames[105] = 'No Biometrics';
Parts[30][163] = 73043672;
PartNames[163] = 'Included USB Biometric FingerPrint Scanner';
Parts[21] = new Array();
Parts[21][134] = 0;
PartNames[134] = '';
Parts[21][135] = 104649107;
PartNames[135] = '';
Parts[11] = new Array();
Parts[11][80] = 0;
PartNames[80] = 'No Virus or Spyware Protection';
Parts[11][81] = 52675725;
PartNames[81] = 'Premium Virus & Spyware Protection Package Install';
Parts[1] = new Array();
Parts[1][160] = 161538890;
PartNames[160] = 'AMD Dual Core Athlon 64 X2 4200+ 64Bit Advanced Processor';
Parts[1][141] = 238796620;
PartNames[141] = 'AMD Dual Core Athlon 64 X2 4800+ 64Bit Advanced Processor';

function init() {
SetDiagramPosition();

id30 = 163;
startUpdate(30, 163);

id21 = 134;
startUpdate(21, 134);

id11 = 80;
startUpdate(11, 80);

id1 = 141;
startUpdate(1, 141);

updatePrices();
}


Ive included the code for how its called. Thanks for info on getElementById the code was written several years ago is finally breaking :)

even this very basic code will not function in IE7, any ideas?

var array;

array['something'] = 'foo';
array['somethingelse'] = 'bar';
for (var keyVar in array) {
alert(keyVar + '--' + array[keyVar]);
}