替换文本节点 #text 中的内容

一：使用 `document.createTreeWalker` 搜索

二：

XML DOM XPathResult 对象

function convert_simp(){

var curDoc = window.document;

if (curDoc.evaluate){

//var xpr = '//text()[string-length(normalize-space(.))>0][name(..)!="SCRIPT"][name(..)!="STYLE"]';

var xpr = '//text()[normalize-space(.)][name(..)!="SCRIPT"][name(..)!="STYLE"]';

var textnodes = curDoc.evaluate(xpr, curDoc,  null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,  null);

var textnodes_length = textnodes.snapshotLength;

//var curNode = null;

for (var i=0, n=textnodes_length, textNodes = textnodes; i<n; ++i) {

var curNode = textNodes.snapshotItem(i);

//if (/[^\x20-\xFF]+/.test(curNode.data)){

//if (/%u/.test(escape(curNode.data))){

curNode.data = toSimp(curNode.data);

//}

}

}else {

window.document.body.innerHTML = toTrad(window.document.body.innerHTML);

}

}