javascript: Object.prototype.newEle=function (type, content, attrs, before) { var ele, i; if(!(this.nodeType==9 || this.nodeType==1 || this.nodeType==3 )) return; if(type) { ele=(this.nodeType==9 ? this : this.ownerDocument).createElement(type); if(attrs) for(i=0; i<attrs.length; i+=2) ele[attrs[i]]=attrs[i+1]; if(content) ele.appendChild((this.nodeType==9 ? this : this.ownerDocument).createTextNode(content)); if(this.nodeType==9) return ele; else { if(before) this.parentNode.insertBefore(ele, this); else this.appendChild(ele); } return ele; } else { if(this.nodeType==1) { if(before) this.parentNode.insertBefore(this.ownerDocument.createTextNode(content), this); else this.appendChild(this.ownerDocument.createTextNode(content)); } } }; function createDoc(){ var win=window.open(location.href,'_blank','height=300,width=300,resizable=yes'); win.clearChild=function(){ var i,ele; for(i=0;i<arguments.length;i++){ ele=this.document.getElementsByTagName(arguments[i])[0]; while(ele.firstChild) ele.removeChild(ele.firstChild); }; }; win.onload=function(){ win.clearChild('head','body','html'); win.document.documentElement.newEle('head'); var body=win.document.documentElement.newEle('body'); body.newEle('h1','jazzlokal'); body.newEle('p').newEle('input','',['type','button','value','innerHTML','onclick', function(){alert(win.document.documentElement.innerHTML)}]); body.newEle('p').newEle('input','',['type','button','value','compatMode','onclick', function(){alert(win.document.compatMode)}]); } }; function go(){ document.body.firstChild.newEle('h1','hallo', '', 1); createDoc(); } go();