problem description

http://zkfiddle.org/sample/hne4jr/5-Another-new-ZK-fiddle

Please Check above URL in Ie. Go to Internet Explorer 11. Then go to tools>internet option>advanced tab>enable script debugging.Then run above fiddle.

When I am trying to drag a non-drag gable list item in list box its showing that Object doesn't support property or method 'apply', File: zk.wpd, Line: 9, Column: 54118. There is only showing error in ZK.WPD file which is internal JS of ZK. in version 7.0.5.1 the error is not showing. But in 7.0.8 its showing. That is a script error . when i debug this using IE-11 developer tool the error is showing like Object doesn't support property or method 'apply', in line 9

steps to reproduce

1. run the attached zul with IE11
2. open the developer tool
3. type 'test' in the textbox
4. double-click the text in the textbox

current result

console shows the error:

Object doesn't support property or method 'apply'
zk.wpd (5161,6)

corresponding code:

ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
							.apply( matched.elem, args );

debug info

• It doesn't happen since zk 8
• when 'selectstart' event fires, somehow handleObj.handle is a boolean value, true, instead of a function.
• a textbox out of a Listbox doesn't have such issue.
• chrome and firefox doesn't have this issue.

workaround

please refer to patch-zk3523.js, based on the solution for ZK-3175