如何添加和删除属性"readonly"？

Question

如何添加和删除属性"readonly"？

$(document).ready(function() {
  //Check City Value
  var city_value = parseInt($("#city").val());
  if( city_value == 0) {
     $("#state").attr("readonly", true);
     //$("#rate").attr("readonly", "readonly");   
  } else {
     $("#state").removeAttr("readonly");
     //document.getElementById("state").removeAttribute("readonly",0);
     //get_states(city_value);
  }
 /***
  //Check State Value
  var state_value = parseInt($('#state').val());
  if( state_value == 0) {
      $('#rate').attr('readonly', true); 
  } else {
     $('#rate').attr('readonly', false);
  }
  ***/
});

Run Code Online (Sandbox Code Playgroud)

这是我的示例代码.

<td><select name="city" id="city">
<option value="0">PLEASE_SELECT_TEXT</option>
<option value="Antalya">Antalya</option>
<option value="Bodrum">Bodrum</option>
<option value="Istanbul">Istanbul</option>
</select>&nbsp;</td>
<td><div id="states"><input type="text" name="state" value="FORCE_FOR_SELECT" readOnly id="state"></div></td>

Run Code Online (Sandbox Code Playgroud)

我还添加了doctype:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Run Code Online (Sandbox Code Playgroud)

Answer 1

que*_*lem 31

是的,最后我找到了解决方案.我用过onChange函数.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script>
//$(document).ready(function() {
function check_city(city_value) {
  //Check City Value
  city_value = $("#city").val();
  if( city_value == "0") {
     $("#state").attr("readonly", true);
     //$("#rate").attr("readonly", "readonly");   
  } else {
     $("#state").attr("readonly", false);
     //$("#state").removeAttr("readonly");
     //document.getElementById("state").removeAttribute("readonly",0);
     //get_states(city_value);
  }
 /***
  //Check State Value
  var state_value = parseInt($('#state').val());
  if( state_value == 0) {
      $('#rate').attr('readonly', true); 
  } else {
     $('#rate').attr('readonly', false);
  }
  ***/
//});
}
</script>

<td><select name="city" id="city" onChange="check_city(this.value)">
<option selected value="0">PLEASE_SELECT_TEXT</option>
<option value="Antalya">Antalya</option>
<option value="Bodrum">Bodrum</option>
<option value="Istanbul">Istanbul</option>
</select>&nbsp;</td>
<td><div id="states"><input type="text" name="state" value="FORCE_FOR_SELECT" readonly id="state"></div></td>

Run Code Online (Sandbox Code Playgroud)

Answer 2

Bal*_*usC 5

在我拥有的所有主流浏览器中都能正常工作.这是一个SSCCE:

<!doctype html>
<html lang="en">
    <head>
        <title>SO question 2496443</title>
        <script src="http://code.jquery.com/jquery-latest.min.js"></script>
        <script>
            $(document).ready(function() {
                $('#toggle').click(function() {
                    $('#foo').attr('readonly', !$('#foo').attr('readonly'));
                });
            });
        </script>
        <style>
            input[readonly] { 
                background: lightgray;
            }
        </style>
    </head>
    <body>
        <input id="foo">
        <button id="toggle">toggle readonly</button>
    </body>
</html>

Run Code Online (Sandbox Code Playgroud)

切换它会使背景变为灰色(虽然并非所有浏览器都这样做)并且输入是不可编辑的(这在所有webbrowsers中都是一致的).所以你的问题就在别的地方.您可能使用的是较差的doctype,也可能与较差的webbrowser结合使用.

归档时间：	15 年，5 月前
查看次数：	83904 次
最近记录：	5 年，9 月前