You can use the following code, which when select it will open the link in a new window.
<form action="../">
<select name="myDestination">
<option value="http://www.website1.com/">Website 1</option>
<option value="http://www.google.com/">GOOGLE</option>
</select>
<input type="button"
value="Open in New Window!"
onclick="ob=this.form.myDestination;window.open(ob.options[ob.selectedIndex].value)">
</form>
或者无需按下按钮:
<form action="../">
<select onchange="window.open(this.options[this.selectedIndex].value,'_top')">
<option value="">Choose a destination...</option>
<option value="http://www.website1.com/">Website 1</option>
<option value="http://www.google.com/">GOOGLE</option>
</select>
</form>
还创建了一个 jsfiddle 来演示:jsFiddle