Javascript 统计复选框选中个数

var checked = document.getElementsByName("checked_c[]");
var checked_counts = 0;
for(var i = 0; i < checked.length; i ++){ 
         if(checked[i].checked){
              checked_counts++;
          }  
}

checked_counts 即是统计复选框选中个数

转载于:https://www.cnblogs.com/dee0912/p/4435157.html