<form name="jumpy">
    <select size="1" onChange="gone()" name="example">
    <option value="http://www.html68.tr.gg" selected="selected">Yahoo.com</option>
    <option value="http://www.html68.tr.gg">Google</option>
    <option value="http://www.html68.tr.gg">Lycos</option>
    <option value="http://www.html68.tr.gg">AltaVista</option>
    </select> <input type="button" onClick="gone()" name="test" value="Go!" />
</form>
<script language="javascript">
var displaymode=0
var iframecode='<iframe id="external" style="width:95%;height:400px" src="http://www.html68.tr.gg/"></iframe>'

if (displaymode==0)
document.write(iframecode)

function gone(){
var selectedurl=document.jumpy.example.options[document.jumpy.example.selectedIndex].value
if (document.getElementById&&displaymode==0)
document.getElementById("external").src=selectedurl
else if (document.all&&displaymode==0)
document.all.external.src=selectedurl
else{
if (!window.win2||win2.closed)
win2=window.open(selectedurl)
//else if win2 already exists
else{
win2.location=selectedurl
win2.focus()
}
}
}

</script><form name="jumpy">
    <select size="1" onChange="gone()" name="example">
    <option value="http://www.html68.tr.gg" selected="selected">Yahoo.com</option>
    <option value="http://www.html68.tr.gg">Google</option>
    <option value="http://www.html68.tr.gg">Lycos</option>
    <option value="http://www.html68.tr.gg">AltaVista</option>
    </select> <input type="button" onClick="gone()" name="test" value="Go!" />
</form>
<script language="javascript">
var displaymode=0
var iframecode='<iframe id="external" style="width:95%;height:400px" src="http://www.html68.tr.gg/"></iframe>'

if (displaymode==0)
document.write(iframecode)

function gone(){
var selectedurl=document.jumpy.example.options[document.jumpy.example.selectedIndex].value
if (document.getElementById&&displaymode==0)
document.getElementById("external").src=selectedurl
else if (document.all&&displaymode==0)
document.all.external.src=selectedurl
else{
if (!window.win2||win2.closed)
win2=window.open(selectedurl)
//else if win2 already exists
else{
win2.location=selectedurl
win2.focus()
}
}
}

</script>