How to retain a selected value in dynamically generated dropdown box to the next jsp page?

I have a drop down box where the options are coming from the configured properties file.The options are generated on load of the page.I have used the following code.

In JSP

<select name="IDNo" id="IDNo">                  

</select>



function loading()

{           

        var d = document.getElementById("system");

        var df=document.getElementById("IDNo");



        var i = 0;

        var disp = document.getElementById("Range");



        var numberOfOptions = df.options.length;

        for (i = 0; i < numberOfOptions; i++) {                  

            df.remove(0);

        }  

        if (d.value == "Apple") {

            df.options[df.options.length] = new Option("ALL","");           

            for(i=1;i<=disp.value;i++)

            {  

                var option = document.createElement("option");                  

                option.text=i;

                option.value=i;

                df.add(option, df.options[null]);

            }

        }