Resetting radio buttons when changing dropdown

[FitzW]

I have a form comprising of a dropdown menu (where u can select a parameter to plot in a graph) and two radio buttons (to decide whether or not the graph is autoscaled. If not, there is a text box where you can define the scale). When I change the parameter in the dropdown, the graph is automatically redrawn with the new parameter. However I want the radio buttons to be reset, so if I chose a manual scale, and I change my parameter, it changes back to autoscale. Is this possible?Here is part of my form code:\[code\]<select id="Graf1" onchange="makeChoice5();updateSelect(this,'Graf2');this.form.submit();" name="graf1"> <option value="http://stackoverflow.com/questions/10834646/other">---------- Kies ---------- </option> <option value="http://stackoverflow.com/questions/10834646/1">Temperatuur</option> <option value="http://stackoverflow.com/questions/10834646/2">Relatieve vochtigheid</option> <option value="http://stackoverflow.com/questions/10834646/3">Straling</option> <option value="http://stackoverflow.com/questions/10834646/4">Dendrometer 1</option> <option value="http://stackoverflow.com/questions/10834646/5">Dendrometer 2</option> </select> </br> <input type="radio" name="schaal" value="http://stackoverflow.com/questions/10834646/1" checked="checked" onclick="makeChoice();">Automatische schaal </br> <input type="radio" name="schaal" value="http://stackoverflow.com/questions/10834646/other" onclick="makeChoice();">Handmatig <input type="text" name="schaalmin" size="6" value="http://stackoverflow.com/questions/10834646/---Min---" onclick="clickclear(this, '---Min---')" onkeydown="return ( event.ctrlKey || event.altKey || (47<event.keyCode && event.keyCode<58 && event.shiftKey==false) || (95<event.keyCode && event.keyCode<106) || (event.keyCode==8) || (event.keyCode==9) || (event.keyCode>34 && event.keyCode<40) || (event.keyCode==46) || (event.keyCode==110) )"> <input type="text" name="schaalmax" size="6" value="http://stackoverflow.com/questions/10834646/---Max---" onclick="clickclear(this, '---Max---')" onkeydown="return ( event.ctrlKey || event.altKey || (47<event.keyCode && event.keyCode<58 && event.shiftKey==false) || (95<event.keyCode && event.keyCode<106) || (event.keyCode==8) || (event.keyCode==9) || (event.keyCode>34 && event.keyCode<40) || (event.keyCode==46) || (event.keyCode==110) )">\[/code\]