grid.RootTable.ChildTables[0].Columns[0].GetElement().childNodes[0].childNodes[0].disabled= true

Hi,

I found solution for the issue. The issue occurs because when closed dialogbox, the process has not finished yet and it is interrupted by FullPostBack request. So, to resolve the issue, I used timeout after called close dialog box function. I also remove some code which I think is not important. see below the code after modify :

function ShowInfoBox(msg, funcOK) {
var wInfoBox = ISGetObject("wdlgWaitInfo");
var span = document.getElementById("span_Message");
span.innerText = msg;


wInfoBox.ShowDialog();
}

function wdlgWaitInfo_OnButtonClicked(controlId, dialogButton) {
var dlgBox = ISGetObject("wdlgWaitInfo");
dlgBox.CloseDialog();
if (dialogButton.Type == "OK") {
window.setTimeout(function(){ConfirmDelete()},100);
}
}

function Delete() {
ShowInfoBox("Confirm Delete?");
}

function ConfirmDelete() {
document.getElementById("<%= btnDelete.ClientID %>").click();
}