jquery實現判斷輸入文字個數的代碼

　　js代碼部分

　　<script type="text/javascript">
$(function() {

　　function albumName() {
var text = $("#album_name")val();
var counter = textlength;
$("#numtj var")text(counter);
$(document)keyup(function() {
var text = $("#album_name")val();
var counter = textlength;
$("#name_word")text(counter);
});
}
});
</script>

　　html部分

　　<input type="text" maxlength="" class="int_txt" name="album_name" id="album_name">
<span class="count_txt"><span id="name_word"></span>/</span>

　　貼張圖看下效果

　　js代碼部分

　　<script type="text/javascript">
$(function() {

　　function albumName() {
   var text = $("#album_name")val();
var counter = textlength;
   $("#numtj var")text(counter);
$(document)keyup(function() {
 var text = $("#album_name")val();
  var counter = textlength;
$("#name_word")text(counter);
});
 }
  });
</script>

　　html部分

　　

　　<input type="text" maxlength="" class="int_txt" name="album_name" id="album_name">
<span class="count_txt"><span id="name_word"></span>/</span>

　　貼張圖看下效果

　　js代碼部分

　　<script type="text/javascript">
$(function() {

　　function albumName() {
   var text = $("#album_name")val();
var counter = textlength;
   $("#numtj var")text(counter);
$(document)keyup(function() {
 var text = $("#album_name")val();
  var counter = textlength;
$("#name_word")text(counter);
});
 }
  });
</script>

　　html部分

　　<input type="text" maxlength="" class="int_txt" name="album_name" id="album_name">
<span class="count_txt"><span id="name_word"></span>/</span>

From:http://tw.wingwit.com/Article/program/Java/JSP/201311/20280.html