jQuery(document).ready(function(){
$( "#project" ).combogrid({
debug:true,
searchButton:true,
resetButton:true,
colModel: [{'columnName':'id','width':'10','label':'id'},
{'columnName':'name','width':'45','label':'title'},
{'columnName':'author','width':'45','label':'author'}],
url: '/server.php',
//"select item" event handler to set input field
select: function( event, ui ) {
$( "#project" ).val( ui.item.name );
return false;
}
});
});

Click on the search button to open the menu. After select an item click on the reset button to reset field.