JavaScript Not Able To Convince Mouse To Change Its Cursor

I have an ASP.NET page with an Infragistics webgrid on it. I handle the mouseover, mouseout events over the rows of the grid in a couple methods in Javascript to change the mouse cursor to the pointer and back to the default as they mouse over rows. I also toggle the color of the mouse-over'd row. When I run the page in debug locally, it works fine. When I publish to the test server, and run it outside of VS in Iexplore (8), the mouse cursor does not change. It stays the arrow. The row toggles the background color correctly, though.

I figured this was a caching issue, but when I add an alert box in the methods to display the document.body.style.cursor, it shows the cursor state in the alert correctly; it just doesn't change the mouse cursor. I've cleared the cache in the browser, deleted and republished, added GUID querystrings to the javascript file links, etc.

If I try the page on the test server in Firefox, it shows the pointer cursor correctly.

function _projGrid_MouseOverHandler(gridName, id, objectType) {
if (objectType == 0) {
document.body.style.cursor = 'pointer';
// alert('mouse pointer should be: ' + document.body.style.cursor);
var cell = igtbl_getCellById(id);
var elem = cell.Element;
setRowBackColor(cell.Row, "F0E68C");
}
}
function _projGrid_MouseOutHandler(gridName, id, objectType) {
if (objectType == 0) {
document.body.style.cursor = 'default';
// alert('mouse pointer should be: ' + document.body.style.cursor);
var cell = igtbl_getCellById(id);
setRowBackColor(cell.Row, "white");
}
}
function setRowBackColor(row, color) {
var cells = row.getCellElements();
for (var i = 0; i < cells.length; i++) {
cells[i].style.backgroundColor = color;
}