Function getElementByXpath

Picviewer CE+/dist.user.js:13646–13650

(xpath,contextNode,doc)

        //xpath 获取单个元素
        function getElementByXpath(xpath,contextNode,doc){
            doc=doc || document;
            contextNode=contextNode || doc;
            return doc.evaluate(xpath,contextNode,null,9,null).singleNodeValue;
        }


        //事件支持检测.