asked on

Using Javascript to disable asp dropdownlist

Check this problem out:

I have two asp:dropdownlist controls on a page. If you select option 3 in the first drop down, then the second drop down should become disabled. If you select anything other than option 3 in the first drop down, then the second dropdown should be (re)enabled.

It would be nice to do this client-side. Can javascript do this?

ASKER CERTIFIED SOLUTION

nauman_ahmed

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Cansler

ASKER

Sweet. Where does the Attributes.Add line go...PageLoad?

nauman_ahmed

Yes. Add it in PageLoad() event.

-Nauman.

pradeepsudharsan

hi,
try
this
'Server Side
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
DropDownList1.Attributes("onchange") = "ChangeDrpDown2()"
End Sub

//Client side java script
function ChangeDrpDown2()
            {

              if(document.Form1["DropDownList1"].options.value==3)
              {
              document.Form1["DropDownList2"].disabled=true;
              }
              else
              {
              document.Form1["DropDownList2"].disabled=false;
              }
            }

regards
pradeep