Hi,
I have not actually tried to debug it.  You should contact developer support for that.  however, just looking at it, I see you are using jquery to completely overwrite the UL.  The ul has the events attached to it.  So they are gone when you do it this way.  Why is it not sufficient to just called $(li).remove()?  The option will be gone.  There should be no need to build up the inner html and reapply it.

regards,
David Young 

Hi David,

did you get the cause of my problem? thanks.

Hi David,

Thanks for your reply. Below is my codes. it really works for removing options from the drop down list, but, unfortunately, the checkboxes before each option are not avalible to click.
Please help check what's the problem of the codes. thanks a lot.

function Filtering_FilterDropdownDisplaying(sender, eventArgs) {

var tc = sender.get_targetContainer();

if(tc.hasChildNodes()) {

if (sender.get_targetContainer().children[1].innerText.indexOf('<a') > -1) {

var html = $(sender.get_targetContainer().children[1].innerHTML);

$.each(html.find('li'), function(index, ctrl) {

if ($(ctrl).attr('val').indexOf('<a'

) > -1) {

$(ctrl).remove();

}

})

sender.get_targetContainer().children[1].innerHTML = '<UL style="PADDING-BOTTOM: 0pt; MARGIN: 0pt; PADDING-LEFT: 0pt; PADDING-RIGHT: 0pt; PADDING-TOP: 0pt" key="Description">' + html.html() + '</UL>';

}

}

}

Hi tony,

You can remove options from the filtering drop down list (filter type of row) by simply handling the showing or shown client event and taking out the LI with the option you do not want to show.

regards,
David Young 

Taz,

did you get the solution for moving some options from filtering dropdownlist?

thanks.