html - JavaScript after Form Handling spit content on page -

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hello i'm trying make website enter name , gets spit out on page. want using javascript.

html:

    <div id='errormsg'></div>     <form action='' method='post' onsubmit="formsubmit();">         <input id='name' type='text' placeholder='slogan here...'>         <input id='submit' type='submit' value='generate'>     </form>     <div id="namecontent"></div>

js:

function formsubmit() { var formname, formerror, namesentence; formerror = document.getelementbyid("errormsg"); formname = document.getelementbyid("name"); namesentence = document.getelementbyid("namecontent"); if (formname == "") {     formerror.innerhtml = "put name in!"; } else if (formname > 20) {     formname.innerhtml = "max. 20 characters"; } else {     namesentence.innerhtml = formname ;     } }

the first problem doesn't give me result. i'm in learning process of javascript please tell me wrong. divs errormsg , namecontent on page. not problem. i want happen without jquery plain javascript

i have noticed few variables not needed.
value of widget accessed id formname removed.

function formsubmit() {    var formerror = document.getelementbyid("errormsg");    var namecontent = document.getelementbyid("namecontent");    var formslogan = document.getelementbyid("name").value;    if (formslogan == "") {      formerror.innerhtml = "put name in!";    }    else if (formslogan.length > 20) {      formerror.innerhtml = "max. 20 characters";    }    else {      formerror.innerhtml = "";      namecontent.innerhtml = formslogan;      return true;    }    return false;  }
<div id='errormsg'></div>  <form action='' method='post' onsubmit="formsubmit();">    <input id='name' type='text' placeholder='slogan here...'>    <input id='submit' type='submit' value='generate'>  </form>  <div id="namecontent"></div>


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