querySelectorAll polyfill

querySelectorAll.js

querySelectorAll = function(index, i, result, magicValue){
  magicValue = 1000;
  return function(rule){ 
    var head = document.getElementsByTagName('head')[0];
    var style = document.createElement('style');
    var css = rule + ' { position:absolute; color:red; top: '+ magicValue + 'px;}';
    style.setAttribute('type', 'text/css');

    if(style.styleSheet && !style.sheet) style.styleSheet.cssText=css;
    else style.innerHTML = css;

    head.appendChild(style);
    document.body.offsetWidth;
    for (var child=document.body.firstChild,result=[]; 
        child != null;
        child=child.nextSibling) {
      
      try{
        var cstyle = window.getComputedStyle ? window.getComputedStyle(child):child.currentStyle;

        if (cstyle['top'] == magicValue+'px') {
            result.push(child);
        }
      }catch(e){}
   }
    head.removeChild(style);
    return result;
  };
}();

var r = querySelectorAll('div')
console.log(r)