Newbie Needs Help! Internet Explorer Issues

Newbie Needs Help! Internet Explorer Issues

Hi guys I'm stuck with a problem and my programmer is out of town and was hoping some here can help me out.

If you look at this page: uitstor.net the drop down on the right works in all browsers except for Internet explorer. After doing hours of research I found this forum and really hope someone can help me out. Here is the scripting on the page if you dont want to go visit the site:

<script>
        function remember_choice(region)
        {
            if (!region) return;
            var date = new Date();
            date.setTime(date.getTime() + 10*24*3600*1000);
            var expires = "; expires="+date.toGMTString();
       
            document.cookie = "region="+region+expires;
            window.location.reload();
        }

    </script>

  <script>
    if (document.cookie.indexOf('region=northamerica') != -1) {
        location.replace('http://www.uitstor.net/cms/');
    } else if (document.cookie.indexOf('region=china') != -1) {
        location.replace('http://uit.com.cn/zh-cn/');
    } else if (document.cookie.indexOf('region=taiwan') != -1) {
        location.replace('http://tw.uitstor.com/');
    }
  </script>

<select name="DropDown" id="DropDown" onChange="remember_choice(event.target.value)">
    <option value="" selected> Please Select Your Region</option>
    <option value="northamerica"> North America</option>
    <option value="northamerica"> Central / South America</option>
    <option value="china"> Asia Pacific</option>
    <option value="china"> China</option>
    <option value="taiwan"> Taiwan</option>
    <option value="northamerica"> EMEA (Europe, Middle East, Africa)</option>
    <option value="northamerica"> ANZA (Australia, New Zealand)</option>
</select>

Note: I think the red bolded text is the problem.