Basic HTML drop down not working with IE 8 in dhmtlx grid

Hi,
I have used normal html drop down i.e. A
in one of columns in grid with the help of placing this inside <!CDATA[ ]>.
It was working fine till date in each and every browser we were supporting in
our application (IE6 & 7, Firefox above 2, opera, safari).
But now we have to support IE 8 as well and now its creating the problem.
------> dropdown is not opening properly (Opens and closes in no time, not allowing the user to select anything)


I know we could have used dhtmlx combo for this but now the project is in critical stage
and the complete functionilty can’t be changed.
Kindly look into the matter asap.

Below is the example of XML where drop down is not opening in IE 8

<![CDATA[

Select
]]>VariableItem DescriptionType<![CDATA[
Scope
]]>#cspanFund/Document Name<![CDATA[
Class
]]>StyleEff. DateExp. Datejsonarray%0Client Name<![CDATA[cssbody=[dvbdy1] cssheader=[dvhdr1] header=[Client Name] body=[Eff Date:
Exp Date: ]]]>Client NameSystem<![CDATA[]]>Global<![CDATA[Oppenheimer]]><![CDATA[-None-]]><![CDATA[defaultLower CaseUpper Case]]>


Atleast provide some hint that which part can be the possible source of conflict.

Thanks

Second select box has “onchange” event handler. If dropDownValues(this,‘styleObject’,‘1000_S’) function is not defined on the page IE8 doesn’t allow select option at select box.