JavaScript: Strip Out Tags

by MythOfEchelon

HTML

<!DOCTYPE html>

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title></title>
        
        <style>
            * {
                margin: 0;
                padding: 0;
            }
        
            html {
                font: 16px "Segoe UI", "Segoe WPC", Helvetica, Arial, "Arial Unicode MS", Sans-Serif;
            }
        </style>
    </head>
    
    <body>
        <div id="page_Wrapper">
            <h1>h1</h1>
            <br />
            <br />
            <br />
            <b>b</b>
            <br />
            <i>i</i>
            <br />
            <u>u</u>
            <div>div</div>
            <span>span</span>
        </div>
        
        <script>
            window.onload = removeTags;
            
            function removeTags(){
                var allTags = document.getElementById("page_Wrapper").childNodes;
                var i = allTags.length;
                
                while (i--){
                    var tag = allTags[i].nodeName.toLowerCase();
            
                    if (tag != "b" && tag != "br" && tag != "i"){
                        allTags[i].parentNode.removeChild(allTags[i]);
                    }
                }
            }
        </script>
    </body>
</html>