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Show Hourglass during XML dataload for DHTMLX grid

We have grids with a lot of data being loaded by loadXML method. (and like DHTMLX grid a lot ;=))
Loading takes some seconds and during load, the user has no indication that data will show up soon.
How can we change cursor to show an hourglass?

We tried with
<div id='grid_ops' style='width:1200px;height:500px;'></div>
<script>
var grid_ops = new dhtmlXGridObject('grid_ops');
...
document.getElementById('grid_ops').style.cursor = 'wait';
document.body.style.cursor = 'wait';
grid_ops.loadXML('/sis/fin/sis_disp_mahng.php?dataloader=grid_ops');
document.getElementById('grid_ops').style.cursor = 'default';
document.body.style.cursor = 'default';
...
</script>
but that does no change the cursor at all.

Thanks for your help!

You can use "onXLE" and on "XLE" event to define if data have been loaded from the server. Please check this article http://dhtmlx.com/docs/products/kb/index.shtml?cat=search&q=948&ssr=yes&s=onXLS