Jquery cache problem, add the current timestamp to the service address of the response __jquery

It is said that the cancellation of caching using

jquery Disable Caching method
$.ajaxsetup ({
Cache:false
});

But the test found no effect, and later it was implemented in a simple way, adding the current timestamp to the service address of the response as follows:

$ ("#ValidateImg")

. html (" ");

Validateimg is the location of a load verification code, and SRC needs to reload the verification code after each hit point. If the write imagecode.aspx, the request is sent to the server side.