javascript - Clear textfield in a form after submit -

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i have following form:

<form onsubmit="chat.sendmsg(); return false;">     <label for="msg" style="float:left">message:</label>     <input type="text" id="msg" name="msg" autofocus="true" placeholder="type meassage here" />     <input type="submit" /> </form>

and javascript goes it:

//for sending message this.sendmsg=function(){      msg=document.getelementbyid("msg").value;     chatzone.innerhtml+='<div class="chatmsg"><b>'+name+'</b>: '+msg+'<br/></div>';     oldata='<div class="chatmsg"><b>'+name+'</b>: '+msg+'<br/></div>';                this.ajaxsent();       return false; };

all works, when submit form, text stays in form. how clear textfield after hit enter/click submit?

ps dont use jquery

use this: document.getelementbyid("msg").value = '';

this.sendmsg=function(){        msg=document.getelementbyid("msg").value;       chatzone.innerhtml+='<div class="chatmsg"><b>'+name+'</b>: '+msg+'<br/></div>';       oldata='<div class="chatmsg"><b>'+name+'</b>: '+msg+'<br/></div>';                  this.ajaxsent();         document.getelementbyid("msg").value = '';//here       return false;  };

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