dynemic dropdown on two select -How do you go about creating two dropdown boxes such

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 <head><script type="text/javascript" src="http://bytes.com/script.js"></script></head> <form  name="buy" action="http://bytes.com/purchase"> <div> <center> <br/><br/><br/><br/> <table> <tr><td> <h3>Product1*</h3></td> <td><select name="pname" onchange="car(document.buy.pname.options[document.buy.pname.selectedIndex].value);"> <option value="">---brand---</option> <option value="1">Maruti</option> <option value="2">Tata</option> <option value="3">BMW</option></select></td> <td> <h3>****Modal*</h3></td> <td><select name="modal"> <option value="">---select---</option> </select> </td> </tr></table></center></div></form>
 
and script.js
 
function car(selobj,newobj)

{var t=document.purchase.modal;

    t.options.length=0;

    if(chosen==="")

        {

             t.options[t.options.length] = new Option('---select---','');

        }

        if(chosen==="1")

            {

                 t.options[t.options.length] = new

Option('800','11');

  t.options[t.options.length] = new

Option('alto','12');

            }

             if(chosen==="2")

            {

                 t.options[t.options.length] = new

Option('nano','21');

  t.options[t.options.length] = new

Option('nano lxi','22');

            }

             if(chosen==="3")

            {

                 t.options[t.options.length] = new

Option('murcdies','31');

  t.options[t.options.length] = new

Option('bmw 123','32');

            }

}

my output is not respond........please do some help
thanks......

Jul 5 '14 #1

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