JQuery - Set Attribute value

Question

I have following HTML with two elements having the same name   lt input type  hidden  name   chk0  value    gt   lt input type  checkbox  name  chk0  value  true  disabled gt    Through JQuery  I want to set the enable the checkbox  So  I am using something like this       chk0   attr  disabled  false     But this doesn t work  I assume JQuery is getting confused with two elements having the same identical name  Unfortunatel  I cannot avoid using two different names because  when the form is posted  I want all the checkboxes to get posted  not just the ones that are checked   Hence I have to use hidden element with the same name   So  back to the question  how can I enable the checkbox through JQuery in the above scenario  Is there a  type  parameter for attr which distingues hidden from checkbox   Thanks

User · Answer

chk0   is refering to an element with the id chk0  You might try adding id s to the elements  Ids are unique even though the names are the same so that in jQuery you can access a single element by it s id

User · Answer

Some things before the actual code    the hash      you use as the selector is for IDs and not for names of elements  also the disabled attribute is not a true false scenario    if it has disabled attribute it means that it is true    you need to remove the attribute and not set it to false  Also there are the form selectors that identify specific types of items in a form     so the code would be      input checkbox name  chk0     removeAttr  disabled        Bringing the answer up-to-date  You should use the  prop   method  added since v1 6      input checkbox name  chk0     prop  disabled   false      to enable the checkbox   and     input checkbox name  chk0     prop  disabled   true      to disable the checkbox

User · Answer

Use an ID to uniquely identify the checkbox  Your current example is trying to select the checkbox with an id of   chk0     lt input type  checkbox  id  chk0  name  chk0  value  true  disabled gt       chk0   attr  disabled    disabled     You ll also need to remove the attribute for disabled to enable the checkbox  Something like       chk0   removeAttr  disabled     See the docs for removeAttr  The value XHTML for disabling enabling an input element is as follows    lt input type  checkbox  id  chk0  name  chk0  value  true  disabled  disabled    gt   lt input type  checkbox  id  chk0  name  chk0  value  true    gt    Note that it s the absence of the disabled attribute that makes the input element enabled

User · Answer

You can add different classes to select  or select by type like this      input type  checkbox     removeAttr  disabled

User · Answer

True  and  False  do not work  to disable  set to value disabled       someElement   attr  disabled    disabled     To enable  remove       someElement   removeAttr  disabled     Also  don t worry about multiple items being selected  jQuery will operate on all of them that match   If you need just one you can use many things  first   last  nth  etc   You are using name and not id as other mention -- remember  if you use id valid xhtml requires the ids be unique

User · Answer

Seriously  just don t use jQuery for this  disabled is a boolean property of form elements that works perfectly in every major browser since 1997  and there is no possible way it could be simpler or more intuitive to change whether or not a form element is disabled   The simplest way of getting a reference to the checkbox would be to give it an id  Here s my suggested HTML    lt input type  hidden  name  chk0  value    gt   lt input type  checkbox  name  chk0  id  chk0 checkbox  value  true  disabled gt    And the line of JavaScript to make the check box enabled   document getElementById  chk0 checkbox   disabled   false    If you prefer  you can instead use jQuery to get hold of the checkbox       chk0 checkbox   0  disabled   false

[javascript] JQuery - Set Attribute value

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