html - How to add a element to HTML5 code with JavaScript -

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i've got problem javascript code. beginner in programming ask me. script must do? after clicking submit button must write on site value of 2 form fields. html code:

<!doctype html> <html lang="pl_pl"> <head> <title>kidgifter</title> <meta charset="utf-8" /> <link rel="stylesheet" href="css/style.css" /> <script src="js/scripts.js"></script> </head> <body> <div id="list_help">     <img id="smile_help" src="img/smile.png">     <div id="info-form">     <p id="l_h_title">hejka!</p>     <p id="l_h_text">tutaj możesz stworzyć swoją liste prezentów udostępnić ją na facebooku lub twitterze. niech twoi znajomi bliscy wiedzą co chcesz dostać!</p>     <p id="l_h_formtitle">najpierw wprowadź nazwę prezentu:</p>     <form>     <input type="text" id="formtitle">     <p id="l_h_formdesc">a teraz możesz krótko go opisać:</p>     <textarea id="formdescription" maxlength="230"></textarea>     <input type="submit" value="+ dodaj" id="sub" />     </form>         </div>      </div> </body> </html>

and javascript code :

window.onload = function(){     var f1 = document.getelementbyid("f1");     var f2 = document.getelementbyid("f2");     var submit = document.getelementbyid("sub");     var body = document.getelementsbytagname("body");     submit.onclick = function() {         html = "";         html += "<div class='gift'>";         html += "<div class='gifttext'>";         html += "<p class='gifttitle'>" + f1.value + "</p>";         html += "<p class='giftdescription'>" + f2.value + "</p>";         html += "</div>";         html += "</div>";         body.appendchild(html);         return false;     } }

thank ! :)

you must create dom element, put rest of html in dom element , use dom element .appendchild() this. appendchild() doesn't take string, takes dom element. also, body variable wasn't correct. here's fixed version:

window.onload = function () {     var f1 = document.getelementbyid("f1");     var f2 = document.getelementbyid("f2");     var submit = document.getelementbyid("sub");     submit.onclick = function () {         var html = "<div class='gifttext'>";         html += "<p class='gifttitle'>" + f1.value + "</p>";         html += "<p class='giftdescription'>" + f2.value + "</p>";         html += "</div>";         var div = document.createelement("div");         div.classname = "gift";         div.innerhtml = html;         document.body.appendchild(div);         return false;     } }

itemized changes:

  1. declare html variable local variable it's not implicit global.
  2. remove outer div html string.
  3. create outer div document.createelement("div").
  4. assign desired class name div.
  5. assign html .innerhtml property of div created.
  6. append div document.body object.
  7. remove code obtaining body variable (it wrong , document.body exists shortcut reference body object).

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