扩展Jquery插件处理mouseover时内部有子元素时发生样式闪烁_jquery

$.containsNode = function(parentNode, childNode) {
if (parentNode.contains) {
return parentNode != childNode && parentNode.contains(childNode);
} else {
return !!(parentNode.compareDocumentPosition(childNode) & 16);
}
}
$.fn.fhover = function(over, out) {
this.hover(function(e) {
if ($.containsNode(e.target, e.currentTarget)) {
return;
}
over.call(this, e);
}, function(e) {
if ($.containsNode(e.target, e.currentTarget)) {
return;
}
out.call(this, e);
});
return this;
}