i m designing registration form.i hav created a drop down box which contains list of different cities.now if the user does not find any particular city then i hav given choice for OTHER option..now problem comes when he selects OTHER option i want a new textbox to visible and can enter his uniqne city which is not in dropdown box.


plz help with code and explanation

prashant

So where do you find the problem, use the onchange event of dropdown and write a javascript function, here check the dropdown's selected value or text for Others, and display the textbox. You can write something like below:

sel: id of dropdown
txt: id of textbox
var obj = document.getElementById("sel");
            if (obj.options[obj.selectedIndex].text == "Others")
            {
                document.getElementById("txt").style.visibility = "visible";
            }
            else
            {
                document.getElementById("txt").style.visibility = "hidden";
            }

Regards
Mike

Don't expect too much, too soon.

hi Mike thank u for the code......but i would not get onchange event of dropdown box, i m able to get in dropdown events like selectedindex change and ontextchange events....plz give more instructions......waiting for ur reply asap

prashant

Well, the onchange event will work for both server side and client side controls, although you may not find it in Intellisense, just write it, and check the result.

Regards
Mike

Don't expect too much, too soon.

Warning 1 Validation (ASP.Net): Attribute 'Onchange' is not a valid attribute of element 'DropDownList'. E:\Demotestpage\Default.aspx 180 72 E:\Demotestpagehi mike i tried the code with onchange event but it gave the above warning and its not working


dont know wat to do .......help

prashant

Well well, I have been using this for a long time, try the below code and let us know if you are still facing problems:

<asp:DropDownList id="DropDownList1" runat="server" onchange="alert('test')">
                <asp:ListItem>First</asp:ListItem>
                <asp:ListItem>Second</asp:ListItem>
            </asp:DropDownList>

Regards
Mike

Don't expect too much, too soon.