检查所选复选框的数量 [英] Checking Number of Selected Checkboxes

问题描述

我在jQuery中看到了 is 函数，例如，如果有任何复选框被选中.

I saw the is function in jQuery, and it returns me, for example, if any of the checkboxes are selected.

我需要检查用户选择了多少个复选框，因为我的应用需要选择其中两个"之类的东西.有快速的方法吗?

I need to do a check for how many checkboxes had been selected by the user, because my app requires something like "select two of these". Is there a quick way to do it?

此外，根据检查，我如何捕捉用户单击提交"然后能够决定是否让表单发送?

Also, how can I catch when the user clicks the "submit" and then be able to decide whether to let the form send or not, according to checks?

推荐答案

要获取选中的复选框数量并绑定到提交"按钮:

To get the amount of checkboxes checked and bind to the submit button:

$("#yourButton").click(function(e){
  var n = $("input:checked").length;  //Checkbox count, may need refined
  if(n<2) //using n from above.
  {
    e.preventDefault(); 
  }
});

工作示例: http://jsfiddle.net/ZtTG2/

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