Open up the previous example, we'll be adding to it. First, we'll need to add an input box and button to the HTML page. We'll create a div that holds them and place it right next to the map. Right after the map div, add the following:

    <div id='input_wrapper' style='position:absolute; left:610px; top:0;'> 
        <input type='text' id='input_tags' value='bird' />     
        <input type='button' id='input_submit' value='Show Data' /> 
    </div>

Next, we'll need to create a function that will get called when the input_submit button is clicked. This function does three things. First, it will set the tags parameter of the vector layer to be equal to whatever value is in the input_tags input box. Secondly, it will call the vector layer's refresh() method which updates the vector...