javascript - Increment elements ID -

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but code checkbox elements have same id...

var count; var length = $('input[type=checkbox]').length for(count=1;count<=length;count++){     $('input[type=checkbox]').attr('id',count) }

set elements id using .prop() or .attr()

$(':checkbox').prop("id", function( ){     return i; });

jsbin demo

set elements id using .each()

$(':checkbox').each(function( ){     this.id = i; });

jsbin demo

both examples return:

<input id="0" type="checkbox"> <input id="1" type="checkbox"> <input id="2" type="checkbox"> <input id="3" type="checkbox">

if want start 1 use:

this.id = i+1;

since numerical id not supported in non html5 (older) browsers, add string prefix id number "el"+ (i+1)


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