function ValidatorSetFocus()

in Hands-on lab/lab-files/BigDataTravel/BigDataTravel/Scripts/WebForms/WebUIValidation.js [210:250]
41 lines of code
33 McCabe index (conditional complexity)

function ValidatorSetFocus(val, event) {
    var ctrl;
    if (typeof(val.controlhookup) == "string") {
        var eventCtrl;
        if ((typeof(event) != "undefined") && (event != null)) {
            if ((typeof(event.srcElement) != "undefined") && (event.srcElement != null)) {
                eventCtrl = event.srcElement;
            }
            else {
                eventCtrl = event.target;
            }
        }
        if ((typeof(eventCtrl) != "undefined") && (eventCtrl != null) &&
            (typeof(eventCtrl.id) == "string") &&
            (eventCtrl.id == val.controlhookup)) {
            ctrl = eventCtrl;
        }
    }
    if ((typeof(ctrl) == "undefined") || (ctrl == null)) {
        ctrl = document.getElementById(val.controltovalidate);
    }
    if ((typeof(ctrl) != "undefined") && (ctrl != null) &&
        (ctrl.tagName.toLowerCase() != "table" || (typeof(event) == "undefined") || (event == null)) && 
        ((ctrl.tagName.toLowerCase() != "input") || (ctrl.type.toLowerCase() != "hidden")) &&
        (typeof(ctrl.disabled) == "undefined" || ctrl.disabled == null || ctrl.disabled == false) &&
        (typeof(ctrl.visible) == "undefined" || ctrl.visible == null || ctrl.visible != false) &&
        (IsInVisibleContainer(ctrl))) {
        if ((ctrl.tagName.toLowerCase() == "table" && (typeof(__nonMSDOMBrowser) == "undefined" || __nonMSDOMBrowser)) ||
            (ctrl.tagName.toLowerCase() == "span")) {
            var inputElements = ctrl.getElementsByTagName("input");
            var lastInputElement  = inputElements[inputElements.length -1];
            if (lastInputElement != null) {
                ctrl = lastInputElement;
            }
        }
        if (typeof(ctrl.focus) != "undefined" && ctrl.focus != null) {
            ctrl.focus();
            Page_InvalidControlToBeFocused = ctrl;
        }
    }
}