Can anyone suggest me if there is any Tapestry in-build component to "Search a Textbox with dropdown suggestion"...
Does the auto complete mixin meet your needs?
http://tapestry.apache.org/5.3/apidocs/org/apache/tapestry5/corelib/mixins/Autocomplete.html
http://jumpstart.doublenegative.com.au/jumpstart7/examples/ajax/autocompletemixin