Code collection to get the value of radio/checkbox group using jQuery_jquery

Copy code The code is as follows: $("document"). ready(function(){ $("#btn1").click(function(){ $("[name='checkbox']").attr("checked",'true'); //Select all }) $("#btn2").click(function(){ $("[name='checkbox']").removeAttr("checked");/ /Unselect all }) $("#btn3").click(function(){ $("[name='checkbox']:even").attr("checked", 'true');//Select all odd numbers }) $("#btn4").click(function(){ $("[name='checkbox']").each( function(){//Reverse selection if($(this).attr("checked")){ $(this).removeAttr("checked"); } else{ $(this).attr("checked",'true'); } }) }) $("#btn5").click(function(){/ /Output the selected value var str=""; $("[name='checkbox'][checked]").each(function(){ str =$(this).val () "rn"; //alert($(this).val()); }) alert(str); }) }) - -> where Copy code The code is as follows: $("[name='checkbox'][checked]").each(function(){ str =$(this).val() "rn"; //alert($(this ).val()); }) This part of the code does not work properly in FireFox. After searching online, I found a method that can be used normally, as shown below: Copy code The code is as follows: $("[name='checkbox']:checked"). each(function(){ str =$(this).val() "rn"; //alert($(this).val()); }) That is: use $("[name='checkbox']:checked") to correctly obtain the collection of selected controls in the radio/checkbox group After running, you need to refresh louis-blog >> jQuery operation on checkbox