Question

Inside my Content page I have a repeater control, which contains multiple controls along with a lable. The Id of lable is “LEmptyComments“. My requirement is to check if the class name of the label is empty or not. The If block never executes what am I doing wrong?

function chkCmnts() {

        var val = 1;
        $("label[id*='LEmptyComments']").each(function () {
            if ($(this).className != "") {
                val = 0;
                return val;
            }
        });
        return val;

    }

This is how the lable look like in the HTML page :

 <span id="MainContent_DlReviewImages_LEmptyComments_13" class="error">...... </span>

Answer 1

className is not a valid jQuery function or property, however you’re calling it on a jQuery object. Additionally, you’re looping over labels and not spans:

function chkCmnts() {
    var val = 1;
    $("span[id*='LEmptyComments']").each(function () {
        if (this.className) { // "" is falsey
            val = 0;
            return val;
        }
    });
    return val;
}

You could actually replace this entire thing with one jQuery statement and a conditional operator on the length of that statement:

function chkCmnts() {
    return $("span[id*='LEmptyComments'][class!='']").length > 0 ? 0 : 1;
}

Example: http://jsfiddle.net/LLKbP/