function RunCode() {
var ele = document.getElementsByTagName("textarea");
for (var i=0; i<ele.length; i++) {
with (ele[i]) {
if (className != "code") continue;
var o = document.createElement("p");
var a = document.createElement("a");
var em = document.createElement("em");
o.className = "runCode";
a.href = "javascript:;";
a.innerHTML = "运行代码";
a.onclick = function() {
var win = window.open('', "_blank", '');
win.document.open('text/html', 'replace');
win.document.writeln(this.parentNode.previousSibling.value.replace(/\u00a0/gi, " "));
win.document.close();
}
em.innerHTML = "（提示：您可以先修改部分代码再运行）";
o.appendChild(a);
o.appendChild(em);
insertAdjacentElement("afterEnd",o);
}
}
}