How to get value of dropdown option with javascript?

[evans m]

<SCRIPT language=JavaScript>
	function reload(form)
	{
		var origin=form.from.options[form.from.options.selectedIndex].value;
		self.location= + origin ;
	}
</script>	
//////and then heres the form it is on////
echo "<select name='from' onchange=\"reload(this.form)\"><option value=''>Select one</option>";
		
		foreach ($tripdetail_query as $qorigin)
			{
				echo "<option value='".$qorigin['From']."'>".$qorigin['From']."</option>";
     
			}
		echo "</select>". '     to     ';

but problem is that origin gets the NaN value. whats up?

[Dormilich]

= + origin ; => implicit type conversion to Number. you probably mean += origin;