Hi Shashank,
To disable an input element from HTML you can just modify it so that it has the disabled attribute. For example:
<input id="searchBox" type="text" class="toolbar-input-text search-component" name="search" data-i18n="[title]controlbar.search" disabled/>
If you want to do it programmatically then you can have something like:
$('#searchBox').prop('disabled', true);
Matt Parizeau
Software Developer
PDFTron Systems Inc.