Why does a data repeater lose textbox references with over 200 items?

[Craig Borri]

I have 2 data repeaters with various controls. One repeater has a checkbox, and there is a corresponding text box on the other. The check box has an onclick that will run javascript to blank out the corresponding text box when it is unchecked.

This all works fine if there are 200 or fewer items on the destination data repeater. When there are over 200 or so items, it seems to lose the text boxes on the later ones. There is no error. The javascript gets a reference to the text box, it uses the correct id, but the text doesn't change.

Any ideas on why a large number of items on a data repeater would cause this?

I will say this is a complex app with lots of hidden fields. Here is some of the javascript it uses.

function ResetMergeLine(obj, lineNo) {
    if (pageLocked == true) {          // Only allow if page is unlocked (not saved)
        return false;
    }
    if (obj.checked == false) {     // find target line and reset it
       var dstPrefix = "rptr2_ctl";   // Source Estimate
        var dstIndex = (lineNo < 10) ? "0" + lineNo.toString() : lineNo.toString();
 
            var txtID = dstPrefix + dstIndex + "_txtMergeFrom";
 
            var txtBox = $get(txtID);
            if (txtBox) {
                    txtBox.value = "";
                    txtBox.disabled = false;
                    mergeLineCount--;
                    if (mergeLineCount < 0)
                        mergeLineCount = 0;
                    CheckMergeDirty();
            }
            else {
                alert("Internal Script Error. Could not find control: " + txtID + ".\n\n Contact Operations.");
            }
    }
}
 

$get is a function that returns a reference to an object. I've looked at it in debug and it seems to be returning the text box just fine, but the value is " ", instead of containing the line number, and the text box doesn't get updated. It doesn't get enabled, either.

Thanks in advance.

[Frinavale]

How are you applying your JavaScript to your CheckBoxes?
It might be that the ID that you are expecting the checkbox to have doesn't exist....

Consider supplying the ClientID of the TextBox to the function instead of the line number.

-Frinny