disable and enable form element using jquery

To Disable the Element:

jQuery('#id').attr('disabled','disabled'); //Here id is form element id

To Enable the Element:

jQuery('#id').removeAttr("disabled");

To Disable the Element:

jQuery('input[name="elementname"]').attr('disabled','disabled'); //Here element name is form element name


To Enable the Element:

jQuery('input[name="elementname"]').removeAttr('disabled');