jquery decision check box is checked for answer tip special effects _jquery

The example in this article tells you whether the jquery decision check box is selected for the answer hint effect code. Share to everyone for your reference. Specifically as follows:
The screenshot of the running effect is as follows:

The specific code is as follows:

First, the principle of implementation:

Step one: Determine which check box is selected by the user

Step two: Give the appropriate hints based on the check box selection

Second, the following to see the main program:

<! DOCTYPE html>
 
 

From the above also can see I assume this problem is a single choice, and the correct answer is a, then began to use JQ to achieve ~ ~ ~

Three, jquery program

$ (function () {
  //Suppose the correct answer is a
  $ ("#button"). Click (function () {
    if ($ ("input"). Filter (": Checked"). length==0 {
      alert ("Please select an option to submit");
    } else if ($ ("#checkbox01"). Filter (": Checked"). length!=0&&$ ("#checkbox02"). Filter (": Checked"). length==0 &&$ ("#checkbox03"). Filter (": Checked"). length==0&&$ ("#checkbox04"). Filter (": Checked"). length==0 {
      alert ("The answer you chose is correct!")
    }else{
      Alert ("The answer you chose is wrong!") ")
    }
  })
})

Before watching the online many judgments check box is selected, after testing is mostly useless, it is estimated that the jquery version of the update to eliminate a lot of programs caused it, who knows, and then use $ ("#id"). Filter (": Checked"). length== 0 It is OK to determine which option is checked and tested.

I hope this article will help you learn about the jquery program.