jquery Realization Click radio button Toggle Check status effect

Effect: Select the button the first time you click the radio button, and uncheck the radio button when you tap it again.

The key is to save the radio button's original value, and the second time you click. If the original selection is canceled, otherwise selected.

Look at the code, it is implemented with jquery, although the function is small. A lot of knowledge ah .....

JS Code

2. $ (document). Ready (function () {
4. var old = null; //Used to save the original object
6. $ ("input[name= ' sex ']"). each (function () {//loop-bound event
8. if (this.checked) {
10. Old = this ; //If the current object is selected, save the object
12. }
14. This.onclick = function () {
16. if (this = = old) {//if the clicked object was originally selected, Uncheck
18. this.checked = false;
20. old = null;
22. } else{
24. Old = this ;
26. }
28. }
30. });
32. });