source: Dev/trunk/src/client/dojox/mvc/tests/doh/helpers.js

// Helper methods for automated testing

function isVisible(/*dijit._Widget || DomNode*/ node){
        // summary:
        //              Return true if node/widget is visible
        var p;
        if(node.domNode){ node = node.domNode; }
        return (dojo.style(node, "display") != "none") &&
                (dojo.style(node, "visibility") != "hidden") &&
                (p = dojo.position(node, true), p.y + p.h >= 0 && p.x + p.w >= 0 && p.h && p.w);
}

function isHidden(/*dijit._Widget || DomNode*/ node){
        // summary:
        //              Return true if node/widget is hidden
        var p;
        if(node.domNode){ node = node.domNode; }
        return (dojo.style(node, "display") == "none") ||
                (dojo.style(node, "visibility") == "hidden") ||
                (p = dojo.position(node, true), p.y + p.h < 0 || p.x + p.w < 0 || p.h <= 0 || p.w <= 0);
}

function innerText(/*DomNode*/ node){
        // summary:
        //              Browser portable function to get the innerText of specified DOMNode
        return node.textContent || node.innerText || "";
}

function tabOrder(/*DomNode?*/ root){
        // summary:
        //              Return all tab-navigable elements under specified node in the order that
        //              they will be visited (by repeated presses of the tab key)

        var elems = [];

        function walkTree(/*DOMNode*/parent){
                dojo.query("> *", parent).forEach(function(child){
                        // Skip hidden elements, and also non-HTML elements (those in custom namespaces) in IE,
                        // since show() invokes getAttribute("type"), which crash on VML nodes in IE.
                        if((dojo.isIE && child.scopeName!=="HTML") || !dijit._isElementShown(child)){
                                return;
                        }

                        if(dijit.isTabNavigable(child)){
                                elems.push({
                                        elem: child,
                                        tabIndex: dojo.hasAttr(child, "tabIndex") ? dojo.attr(child, "tabIndex") : 0,
                                        pos: elems.length
                                });
                        }
                        if(child.nodeName.toUpperCase() != 'SELECT'){
                                walkTree(child);
                        }
                });
        };

        walkTree(root || dojo.body());

        elems.sort(function(a, b){
                return a.tabIndex != b.tabIndex ? a.tabIndex - b.tabIndex : a.pos - b.pos;
        });
        return dojo.map(elems, function(elem){ return elem.elem; });
}


function onFocus(func){
        // summary:
        //              On the next change of focus, and after widget has had time to react to focus event,
        //              call func(node) with the newly focused node
        var handle = dojo.subscribe("focusNode", function(node){
                dojo.unsubscribe(handle);
                setTimeout(function(){ func(node); }, 0);
        });
}