Hide the input search field

Hi all,

I need to hide the input fields(Low and high) when user select the "particular " operator in opportunity search .

We can replicate the same scenario by taking the operator 'EM' , When we select this operator both low and high input fields are disable .

I debugged , it is happening in standard server event  'thtmlbGroupScenarioOperatorChange' in class CL_THTMLB_ADVANCEDSEARCHin method IF_BSP_ELEMENT~DO_AT_BEGINNING.

But there is no implicit or explicit enhancements to handle.

Please help how to handle , at least to disable the input field instead of hide.

regards,

ram