Javascript 疑问

mikeng · 发表于 31-8-2012 11:57 PM

请问我要如何做到：-
1）当click Symbols 表情符号时，characters 会扣？
2) 如何 detect SMStextarea里有华语字，且立刻把 160 (max character/message)改去60?

希望高手们帮帮忙，万分谢意。

<html》
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script type="text/javascript" src="./jquery.min.js"></script>
<script type='text/javascript'>
window.onload=function(){
var SMSParaVars = {
SMSsymbol1: "

",
SMSsymbol2: "

"
};
var mysmstextarea = document.getElementById('SMStextarea');
var mysmssymbolslist = document.getElementById('SMSsymbolslist');

  mysmssymbolslist.onchange = function(){
mysmstextarea.value = mysmstextarea.value  + SMSParaVars[this.value];
  }
}

$(function(){
var $mysmsremaining = $('#SMSremaining'),
$mysmsmessages = $mysmsremaining.next();
$('#SMStextarea').keyup(function(){
var smschars = this.value.length;
mysmsmessages = Math.ceil(smschars / 160),
mysmsremaining = mysmsmessages * 160 - (smschars % (mysmsmessages * 160) || mysmsmessages * 160);
$mysmsremaining.text(mysmsremaining + ' characters /');
$mysmsmessages.text(mysmsmessages + ' message');
});
});
</script>
<body>
<form name="frmsms" id="frmsms">
  <table width="auto" border="0">
<tr>
   <td align="center"><b>Symbols</b>
      <select id="SMSsymbolslist" size="2">
<option value="SMSsymbol1">Happy

</option>
<option value="SMSsymbol2">Sad

</option>
      </select>
   </td>
</tr>
<tr>
   <td>
   <textarea name="SMStextarea" id="SMStextarea" cols="37" rows="12"></textarea>
      <span id="SMSremaining">150 characters /</span>
      <span id="SMSmessages">1 message</span>
   </td>
</tr>
  </table>
</form>
</body>
</html>

cacphy · 发表于 4-9-2012 05:41 PM

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.min.js"></script>
<script type='text/javascript'>

$(function(){
  var limitChar, SMSParaVars
  , $mysmsmessages, $mysmsremaining, $mysmstextarea, $mysmssymbolslist;

  limitChar                = 160; // default 160 chars
  $mysmsremaining    = $('#SMSremaining');
  $mysmstextarea    = $('#SMStextarea');
  $smsMessagesCount = $('#SMSmessages');
  $mysmssymbolslist = $('#SMSsymbolslist');
  $mysmsmessages = $mysmsremaining.next();

  SMSParaVars = {
SMSsymbol1: "

",
SMSsymbol2: "

"
  };

  $mysmssymbolslist.live('change', function(){
$mysmstextarea.val($mysmstextarea.val()  + SMSParaVars[this.value]);

calc();
  });

  calc();

  $('#SMStextarea').keyup(function(){
calc();
  });

  function calc() {
var smschars, mysmsmessages;

smschars          = $mysmstextarea.val().length;
mysmsmessages = Math.ceil(smschars / limitChar);

if(isChinese()) {
   limitChar = 60;
} else {
   limitChar = 160;
}

mysmsremaining = mysmsmessages * limitChar - (smschars % (mysmsmessages * limitChar) || mysmsmessages * limitChar);

$mysmsremaining.find('span').text(mysmsremaining);
$mysmsmessages.find('span').text(mysmsmessages);
  }

  function trim(str){
return str.replace(/^\s*|\s*$/g,""

;
}

function isChinese() {
var j, s;

j = 0;
s = trim($mysmstextarea.val());

if (s==""

return true;

for (var i=0; i<s.length; i++) {
   if (( (s.charCodeAt(i)== 32)
   || (s.charCodeAt(i)>=19968 && s.charCodeAt(i)<=64041) )) {
      return true;
   }
}

return false;
  }
});
</script>
<body>
<form name="frmsms" id="frmsms">
  <table width="auto" border="0">
<tr>
   <td align="center"><b>Symbols</b>
      <select id="SMSsymbolslist" size="2">
<option value="SMSsymbol1">Happy

</option>
<option value="SMSsymbol2">Sad

</option>
      </select>
   </td>
</tr>
<tr>
   <td>
   <textarea name="SMStextarea" id="SMStextarea" cols="37" rows="12"></textarea>
      <span id="SMSremaining"><span></span> character(s) /</span>
      <span id="SMSmessages"><span></span> message(s)</span>
   </td>
</tr>
  </table>
</form>
</body>
</html>

mikeng · 发表于 8-9-2012 01:17 PM

谢谢。thank you very much

cacphy · 发表于 13-9-2012 04:40 PM

不用客气。＝）

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