First of all I would be so happy if someone could help me ...

I have in my file a dropdownlist with a button, when there's a name selected I need to see the
corresponding data that is with that name (adress, cell, ...) from a database that I've made.

<select name="DropDownList" id="DropDownList">

<option value="name>name</option>
<option value="name1">name1</option>
<option value="name2">name2</option>


<input type="submit" name="Buttonshow" value="Toon informatie" onclick="???" id="Submit1" DataSourceID="SqlDataSource1" />

I already have this, I just don't know how I could retrieve the data from the selected name from my database.. What should the "on click" do and is there any code i should have extra or so ...?

already thanks in advance