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A unit type of "em" is invalid for parse padding

Description

 
Please, please look at the attached project (zipped) VS2008, where the AjaxToolkit 3.0.3512 - DropDownExtender in a GridView ("Status" column) with my mandatory CSS produces the popup error message from the title.
That occurs with IE7 but not with Firefox 2.

Thanks in advance,
Andrei Martin Aszodi

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aszodiam wrote Jun 28 at 10:09 AM
The function:

parsePadding: function(padding) {
/// <summary>
/// Parses a padding string into a pixel size
/// </summary>
/// <param name="padding" type="String" mayBeNull="true">
/// Padding to parse ('inherit',px unit,null,'')
/// </param>
/// <returns type="Number" integer="true">
/// Number of pixels in the padding
/// </returns>

if (padding) {
if (padding == 'inherit') {
return 0;
}
var unit = this.parseUnit(padding);
Sys.Debug.assert(unit.type == 'px', String.format(AjaxControlToolkit.Resources.Common_InvalidPaddingUnit, unit.type));
return unit.size;
}
return 0;
},

from Common.js called by getMargin: function(element, boxSide) and getPadding: function(element, boxSide).

If the code could explaine that the "em" unit.type is returning invalid, is at least strange that Firefox works with while IE7 doesn't.

aszodiam wrote Jun 28 at 9:55 AM
The correct version of AjaxToolkit is 3.0.30512.

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