Menus and Navigation >>> Menu Automatic.

<script
		language="javascript"
		type="text/javascript">      
		

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		function 
		formHandler(form){

		var
		URL
		=
		document.form.site.options[document.form.site.selectedIndex].value;

		window.location.href
		=
		URL;

		}

		// End -->

		</script>

		<form
		name="form">

		<select 
		name="site"
		size=1
		onChange="javascript:formHandler()">

		<option 
		value="">Go 
		to....

		<option
		value="http://www.yahoo.com">Yahoo

		<option
		value="http://www.metacrawler.com">Metacrawler

		<option
		value="http://www.altavista.digital.com">Altavista

		<option
		value="http://www.webcrawler.com">Webcrawler

		<option
		value="http://www.lycos.com">Lycos

		<option
		value="http://www.yaldex.com/JSFactory_Pro.htm">JavaScript 
		Editor

		</select>

		</form>