function show_hide(panel_id,button_id){if(document.getElementById(panel_id).style.display=='none'){document.getElementById(panel_id).style.display='';document.getElementById(button_id).style.display='none'}else{document.getElementById(panel_id).style.display='none'}}
function preview_markdown(){if(document.getElementById('preview-container').style.display=='none'){document.getElementById('preview-container').style.display=''}
var $=function(id){return document.getElementById(id)};new Editor($("message"),$("preview"))}
function Editor(input,preview){this.update=function(){preview.innerHTML=markdown.toHTML(input.value)};input.editor=this;this.update()}