Microsoft JScript runtime error: Object required

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C#

function pnlvisible()
        {
            //document.getElementById('ctl00_ContentPlaceHolder1_drptree_pnl').
            //if (document.getElementById("ctl00_ContentPlaceHolder1_drptree_pnl").style.visibility == "visible")
            //{
                document.getElementById("ctl00_ContentPlaceHolder1_drptree_pnl").style.visibility = 'hidden';
            //}

    }

i am getting Microsoft JScript runtime error: Object required during the runtime.
what is error .Is there anyway to solve this.

Posted 14-Sep-12 2:31am

Member 9364222

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Sandeep Mewara · Accepted Answer · 2012-09-14T02:59:00

Solution 1

Error for the above line means that the following was undefined: document.getElementById("ctl00_ContentPlaceHolder1_drptree_pnl"). Thus, when you try to access certain property, it is unable to find the object and thus raises an error.

2 Options:
1. Either make sure that the name is exactly the same as when page rendered (you can get it doing page view source)
2. Use: <%= myPanel.ClientID %>

Posted 14-Sep-12 2:59am

Sandeep Mewara

Updated 14-Sep-12 3:01am

v2

Comments

Member 9364222 25-Sep-12 8:40am

function ShowPanel()
{
if (event.keyCode == 13)
{
document.getElementById("pnl1").style.Visibility = 'visible';
}
}

my aspx control is
<asp:TextBox ID="txtare" runat="server" class="Txt-box1" Width="230px"/>
<asp:Panel ID="pnl1" runat="server" BorderColor="Black" BorderWidth="1px" Width="250px"
Style="position: absolute; background-color: White; visibility: hidden" Height="250"
ScrollBars="Auto" ClientIDMode="Static">
<div id="trvdiv" runat="server">
<asp:TreeView ID="trev" runat="server" Width="100%" CssClass="myTxt" ImageSet="Msdn"
NodeIndent="10" ShowLines="True" NodeWrap="True" OnSelectedNodeChanged="trev_SelectedNodeChanged">
<ParentNodeStyle Font-Bold="True" HorizontalPadding="5px" />
<hovernodestyle font-underline="True">
<SelectedNodeStyle Font-Underline="False" HorizontalPadding="3px" VerticalPadding="1px" />
<nodestyle font-names="Verdana" font-size="8pt" width="100%" forecolor="Black" horizontalpadding="5px"
="" nodespacing="1px" verticalpadding="2px">
<rootnodestyle horizontalpadding="5px" width="100%" font-bold="True" forecolor="#0E5D7A">
<leafnodestyle horizontalpadding="5px" width="100%">

</div>

In my aspx.cs i have included

txtare.Attributes.Add("onkeypress", "ShowPanel()");

While running i am getting the microsoft jscript runtime error:Object required

Is there any solution for this.

Sandeep Mewara 25-Sep-12 10:00am

Depends on what line the error is occurring!

Member 9364222 26-Sep-12 2:57am

document.getElementById("pnl1").style.Visibility = 'visible';

I am getting the error on this line

Sandeep Mewara 26-Sep-12 3:03am

This just means that the object document.getElementById("pnl1"). was null and not found OR document.getElementById("pnl1").style.Visibility was null.
I see you used a capital V for visibility. It should be small. Try:
document.getElementById("pnl1").style.visibility and try.

P.S.:
If you set a controls visiblity as false in the code behind(server side) during page load, that control will not render and thus any reference to it on client side cannot be made.

If you want to play with visibility of such controls, use 'display' property in such scenarios.

Do: document.getElementById("pnl1").style.display = 'block';
Use atrributes.Add to set display as hidden in code behind.