Apply selected attribute to select box item via JS

[tracedef]

Hiya!

I've created the simple select box below that will "onchange" when an item is selected. I'm trying to apply the "selected" attribute to items that are chosen from the menu, so that if "Home Page #2" is selected, the "selected" attribute will be applied to "Home page #2" once you arrive at "Home Page #2".

I've follow a few simple tutorials with no luck and even tried php conditionals to trigger the "selected" attribute with no luck.

Any feedback is GREATLY appreciated, thank you!

<form name="guideform" method="get">
<select class="wptdb_jumpbar_select" name="mymenu" onChange="window.location=document.guideform.mymenu.options[document.guideform.mymenu.selectedIndex].value">
<option value="/1">Home Page #1</option>
<option value="/2">Home Page #2</option>
<option value="/3">Home Page #3</option>
<option value="/4">Home Page #4</option>
</select>
</form>