function limitChars(textarea,limit,infodiv)
{var text=textarea.value;var textlength=text.length;var info=document.getElementById(infodiv);if(!info){return;}
if(textlength>limit)
{info.innerHTML='<strong>You cannot write more than '+limit+' characters!</strong>';textarea.value=text.substr(0,limit);return false;}
else
{info.innerHTML=(limit-textlength)+' characters left.';return true;}}