代码如下:
<script language="JavaScript">
function findAll(s){
if(s.length==0){
alert("请输入查询关键字");
}
s=encode(s);
var TDs=document.all.DataT1.all.tags("TD");
var num=0;
for(var i=0;i<TDs.length;i++){
var tdObj=TDs[i];
var obj=tdObj.childNodes[0];
if(!obj.className || obj.className!="highlight"){
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'>$1</span>");
obj.innerHTML=t;
num=num+cnt;
}
}
alert("查找到关键字"+num+"处");
}
function encode(s){
return s.replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/([///./*/[/]/(/)/$/^])/g,"//$1");
}
function decode(s){
return s.replace(///([///./*/[/]/(/)/$/^])/g,"$1").replace(/>/g,">").replace(/</g,"<").replace(/&/g,"&");
}
function 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,"gi");
var tm=null;
var t=dest.nodeValue;
var cnt=0;
var arr=new Array();
var a="";
var b="";
if(tm=t.match(r)){
cnt=tm.length;
a=tm.toString();
arr=a.split(",");
for(var i=0;i<arr.length;i++)
b="{searchHL}"+arr[i]+"{/searchHL}";
t=t.replace(r,b);
dest.nodeValue=t;
}
return cnt;
}
</script>
<style type="text/css">
.highlight{background:blue;font-weigh:bold;color:black;}
</style>
以上方法需要注意的有两点:1,在findAll 中obj取到最小单位,否则的话替换会出乱,我在实践中体会这一点主要是和数据岛绑定有关,一般的文本是不需要这么小心的.2,replace方法将tm拆分成数组,也和表格有关,一般的文本不需要拆分
如果是一般的文本可以如下写
代码如下:
<script language="JavaScript">
function findAll(s){
if (s.length==0){
alert('搜索关键词未填写！');
return false;
}
s=encode(s);
var obj=document.getElementsByTagName("body")[0];
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;
alert("搜索到关键词"+cnt+"处")
}
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}")
