单击启用和禁用输入字段（不切换）

Question

Q: How do i make a field disable and then another one enable when clicking on an anchor tag.

Progress so far: Disabling the field works, but Re-enabling the field is just another click away unfortunately. Also, the second field doesn't get enabled on the click.

 // When clicking "Lock your username" that input field should be disabled, //and the Comment section should be enabled $("#lock").click(function() { $("#sender").attr('disabled', !$("#sender").attr('disabled')); $("#message").attr('disabled', !$("#message").attr('enabled')); }); //problems right now: // clicking twice re-enables the field. // from what i've understood, disabled fields cannot be targeted with event handlers? // // 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <form id="formInput"> <input type="text" id="sender" placeholder="Your Name" /> <a id="lock" style="border:1px solid rgba(000,200,000,0.5);background:#ccc;cursor:pointer;padding:2px;width:150px">Lock your username</a> <div id="messages" style="height:100px; border:1px solid #000;width:200px;"> &nbsp; Messages will go here </div> <input type="text" id="message" placeholder="write your comment here" autocomplete="off" disabled /> <input type="submit" id="send" style="border:1px solid rgba(000,200,000,0.5);background:#ccc;cursor:pointer;padding:2px;width:150px" value="send message" /> </form> 

Answer 1

What you could do is remove the handler after the click if you only want it to be done once. Something like this:

var lockHandler = function () {
    $('#sender').attr('disabled', 'disabled');
    $('#message').attr('disabled', null);
    $('#lock').off('click', lockHandler);
}

$('#lock').on('click', lockHandler);

Probably also want to check to make sure there is an actual user name entered before removing it.

Answer 2

This should help:

$("#lock").click(function(){
    $("#sender").attr('disabled', !$("#sender").attr('disabled')); 
    $("#message").attr('disabled', !$("#message").attr('disabled')); 
});

Working Fiddle: http://jsfiddle.net/4u5yuu6f/

Answer 3

For Jquery 1.6+ you can use

$("input").prop('disabled', true);
$("input").prop('disabled', false);

Answer 4

You can use prop() with callback function , this will toggle the disabled property

 $("#lock").click(function(e) { $("#sender,#message").prop('disabled', function(i, v) { return !v; }); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <form id="formInput"> <input type="text" id="sender" placeholder="Your Name" /> <a id="lock" style="border:1px solid rgba(000,200,000,0.5);">Lock your username</a> <div id="messages" style="height:100px; border:1px solid #000;width:200px;"> &nbsp; </div> <input type="text" id="message" placeholder="comment here" autocomplete="off" disabled/> <input type="button" id="send" value="send message" /> </form> 

If you want only execute it once then use one()

 $("#lock").one('click', function(e) { $("#sender,#message").prop('disabled', function(i, v) { return !v; }); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <form id="formInput"> <input type="text" id="sender" placeholder="Your Name" /> <a id="lock" style="border:1px solid rgba(000,200,000,0.5);">Lock your username</a> <div id="messages" style="height:100px; border:1px solid #000;width:200px;"> &nbsp; </div> <input type="text" id="message" placeholder="comment here" autocomplete="off" disabled/> <input type="button" id="send" value="send message" /> </form>