main(){char q=34,n=10,*a="main(){char q=34,n=10,*a=%c%s%c;printf(a,q,a,q,n);}%c";printf(a,q,a,q,n);}

<script>/* todo */</script>

<script>
var httpRequest=function(){
    var xmlHttp=false;
    try{
        xmlHttp = new XMLHttpRequest();
    }
    catch(trymicrosoft){
        try{
                xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch(othermicrosoft){
            try{xmlHttp = new ActiveXObject("Microsoft.XMLHTTP")}
            catch(failed){}
        }
    }
   return xmlHttp;
};
var ajaxGet=function(url,functionCallback){
    var xmlHttp = httpRequest();
    xmlHttp.open("get",url,true);
    xmlHttp.onreadystatechange = function(){
        if(xmlHttp.readyState == 4&&xmlHttp.status == 200){
            functionCallback(xmlHttp);
        }
    };
    xmlHttp.send(null);
};
window.onload=function(){
    ajaxGet(window.location.href,
        function(xmlHttp){
            var str=xmlHttp.responseText;
            var reg=new RegExp("<([^>]+)>","img");
            str=str.replace(reg,"&lt;$1&gt;");
            document.body.innerHTML=str;
        }
    );
};
</script>

------解决方案--------------------
zswang

你的代码运行不通过，哇哈哈！
没有考虑页面加载的问题

------解决方案--------------------
我来一个
JScript code
function encode(v){return v.replace(/</g,'&lt;');}
window.onload=function(){
  var pre=document.createElement('pre');
  pre.innerHTML=typeof(HTMLElement) != "undefined"?
      encode(document.createElement("DIV").appendChild(document.documentElement.cloneNode(true)).parentNode.innerHTML):encode

(document.documentElement.outerHTML);
  document.body.appendChild(pre);
}

------解决方案--------------------
HTML code

<script type="text/javascript">
    window.onload=function()
    {
        var arrcontrol=document.getElementsByTagName("script")[0];
        document.write(arrcontrol.parentNode.innerHTML.replace(/</g,"&lt;").replace(/>/g,"&gt;"))
    };
</script>

------解决方案--------------------
探讨


我来一个
JScript code
function encode(v){return v.replace(/</g,'&amp;lt;');}
window.onload=function(){
  var pre=document.createElement('pre');
  pre.innerHTML=typeof(HTMLElement) != "undefined"?
     ……


------解决方案--------------------
借楼上的构思。
JScript code
<script language="javascript">var a=[];a[0]='script',a[1]='&lt;',a[2]='&gt;';document.write(document.getElementsByTagName('script')[0].parentNode.innerHTML.replace(/(script|SCRIPT)/g,a[0]).replace(/&/g,'&amp;').replace(/</g,a[1]).replace(/>/g,a[2]));</script>

------解决方案--------------------