// JavaScript Document
var ns6=document.getElementById&&!document.all

function restrictinput(maxlength,e,placeholder){
  if (window.event&&event.srcElement.value.length>=maxlength)
    return false
  else if (e.target&&e.target==eval(placeholder)&&e.target.value.length>=maxlength){
    var pressedkey=/[a-zA-Z0-9\.\,\/]/ 
    if (pressedkey.test(String.fromCharCode(e.which)))
      e.stopPropagation()
  }
}

function countlimit(maxlength,e,placeholder){
  var theform=eval(placeholder)
  var lengthleft=maxlength-theform.value.length
  var placeholderobj=document.all? document.all[placeholder] : document.getElementById(placeholder)
  if (window.event||e.target&&e.target==eval(placeholder)){
    if (lengthleft<0)
      theform.value=theform.value.substring(0,maxlength)
    placeholderobj.innerHTML=lengthleft
  }
}

function displaylimit(thename, theid, thelimit){
  var theform=theid!=""? document.getElementById(theid) : thename
   var limit_text='（残り' + '<b><span id="' + theform.toString() + '">' + thelimit + '</span></b>文字）'

  if (document.all||ns6)
    document.write(limit_text)
  if (document.all){
    eval(theform).onkeypress=function(){ return restrictinput(thelimit,event,theform)}
    eval(theform).onkeyup=function(){ countlimit(thelimit,event,theform)}
  }
  else if (ns6){
    document.body.addEventListener('keypress', function(event) { restrictinput(thelimit,event,theform) }, true); 
    document.body.addEventListener('keyup', function(event) { countlimit(thelimit,event,theform) }, true); 
  }
}


// テキストエリア／文字数カウントダウン
function CountDownLength( idn, str, mnum ) {
   document.getElementById(idn).innerHTML = "（残り" + (mnum - str.length) + "文字）";
}