I am referring specifically to the jQuery Autocomplete v1.1 plugin by Jörn Zaefferer [source: http://bassistance.de/jquery-plugins/jquery-plugin-autocomplete/] as there seems to
jQuery( "#jac" ).autocomplete({ source: autocompleteURL, minLength: 2, search: function( event, ui ) { // update source url by adding new GET params $(this).autocomplete( 'option', 'source', autocompleteURL + 'var1=aaa&var2=bbb' ); } })
Works for me with jquery.ui.autocomplete 1.8.17