Get Gridview Cell Value using JavaScript

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ASP.NET

Javascript

I got a gridview with a checkbox column, which I'm able to determine whether a row is checked. My problem is that I can't get the cell value. I'm using javascript. I'm using JS since I have to make an ajax call once I get the cell value. Thx in advance. Here's my code:

function newData(mode) {

    if (mode == 'edit') {
        var valid = false;
        var gv = document.getElementById("myGridview");

        for (var i = 0; i < gv.all.length; i++) {
            var node = gv.all[i];
            if (node != null && node.type == "checkbox" && node.checked) {
                valid = true;
                break;
            }
        }
        if (!valid) {
            alert("Invalid. Please select a checkbox to continue.");
        }

        return valid;
    }