Quick post, to handle parameters in your webpage via javascript, try this...

Request.QueryString with JS

• CSJS Object.js
• the file, stored locally

Include the file in your header section then use like...

mypage.html?username=john

With the Javascript...

var name = '';
if (Request.QueryString("username").Count > 0) {
    name = Request.QueryString("username").Item(1);
}

The function returns the querystring as an object, so to determine whether you have any parameters returned count the number of objects. The first of which we want so we use .Item(1) to grab that and stick it in our variable name after which we can give to an alert() popup or whatever we need.

On Select Redirect with JS

Here's another bit, this will force the browser to redirect to another page once the user selects a value from the drop-down box and clicks the button image.

Javascript...

function goto(form) {
var index=form.select.selectedIndex
    if (form.select.options[index].value.length != 0) {
        location.replace(form.select.options[index].value);
    }
}

Html...

<FORM NAME="form1">
<select name="select" id="select" style="width:90px;">
<option value="http://www.red91.com/">my site</option>
</select>
<img src="button.gif" onclick="goto(form1)" />
</FORM>