function encode(s){
  return s.replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/([\\\.\*\[\]\(\)\$\^])/g,"\\$1");
}
function decode(s){
  return s.replace(/\\([\\\.\*\[\]\(\)\$\^])/g,"$1").replace(/>/g,">").replace(/</g,"<").replace(/&/g,"&");
}
function highlight(s){
 
  if (s.length==0){
      alert('搜索关键词未填写！');
      $("#high").find("li").css("display", "block");
    return false;
}
if (s == "在本页一键查找,找公告更方便!") {
    $("#high").find("li").css("display", "block");
    return false;
}
  s=encode(s);
  //var obj=document.getElementsByTagName("body")[0];
  var obj=document.getElementById("high");
 
  var t=obj.innerHTML.replace(/<span\s+class=.?highlight.?>([^<>]*)<\/span>/gi,"$1");
  obj.innerHTML=t;
  var cnt=loopSearch(s,obj);
  t=obj.innerHTML
  var r=/{searchHL}(({(?!\/searchHL})|[^{])*){\/searchHL}/g
  t=t.replace(r,"<span class='highlight'>$1</span>");
  obj.innerHTML=t;
  if (cnt == 0) {
      if (confirm("很抱歉！在本页没有发现符合条件的公告，要进入搜索系统查找吗？")) {
          self.location = "http://search.paifun.net/q?c=1&t=" + encodeURI(s);
      }
  }
  else {
      //先显示全部
      $("#high").find("li").css("display", "block");
      $("#tool_shows").css("color", "blue");
      $("#tool_shows").click(function() {
          $("#high").find("li").css("display", "none");
          $("#high").find("span[class='highlight']").parent().parent().css("display", "block");
           
      });
  }
}
function loopSearch(s,obj){
  var cnt=0;
  if (obj.nodeType==3){
    cnt=replace(s,obj);
    return cnt;
  }
  for (var i=0,c;c=obj.childNodes[i];i++){
    if (!c.className||c.className!="highlight")
      cnt+=loopSearch(s,c);
  }
  return cnt;
}
function replace(s,dest){
  var r=new RegExp(s,"g");
  var tm=null;
  var t=dest.nodeValue;
  var cnt=0;
  if (tm=t.match(r)){
    cnt=tm.length;
    t=t.replace(r,"{searchHL}"+decode(s)+"{/searchHL}")
    dest.nodeValue=t;
  }
  return cnt;
}