How to fill dropdown boxes dynamically in Classic Asp

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ASP

Javascript

I have a two DropDown Boxes
in Asp Page.
I have Filled the First DropDown Box As

<select name="selDiv" id="selDiv" style="width: 420px">
		<option value="1">A</option>
		<option value="2">B</option>
		<option value="3">C</option>
		<option value="4">D</option>
		<option value="5">E</option>

		</select>

Next I have Another DropDown Box and my need
is to Query the Database Acoording to the Value Selected in the First DropDownBox
mean i have to Query on the Values 1,2,3,4.
When User Selects from First DropDown
According it should Query the Database
and then Value Should be Filled in the Second DropDownBox.

Please Assist .How Can I do This .Am using Javascript to Query the database.how can i do this.