IE's document.all emulation for ECMAScript 5 Standard supported browser. DON'T USE AT THE PRODUCTION. TEST OR BENCHMARK PURPOSE ONLY. ESPECIALLY, don't use document.all ! NEVER! DON'T EVER!

document.all.js

Object.defineProperty(document, "all", { 
    get: function(){ 
        var dup = {}; 
        return (function(all){ 
            for(var i=0,len=all.length;i<len;i++){ 
                var id = all[i].id, name = all[i].name; 
                if(id && dup[id] != 'id'){ 
                    all[id] = all[i]; 
                    dup[id] = 'id'; 
                } 
                if(name && !dup[name]){ 
                    all[name] = document.getElementsByName(name); 
                    dup[name] = 'name'; 
                } 
            } 
            return all; 
        })(document.getElementsByTagName('*')); 
    } 
});