限制只能中文輸入的方法

　　function isCharsInBag (s bag)
{ 
  var ic;
  for (i = ; i < slength; i++)
  {  
        c = scharAt(i);//字符串s中的字符
    if (bagindexOf(c) > )
        return c;
  }
  return "";
}
檢查函數:
function ischinese(s)
{
var errorChar;
var badChar = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz><[]{}?/+=|":;~!#$%()`";
     errorChar = isCharsInBag( s badChar)
        if (errorChar != "" )
    {
        report=report+"請重新輸入中文n";
        return false;
    }    
   
    return true;
}

From:http://tw.wingwit.com/Article/program/net/201311/14103.html