The src of the image img remains unchanged, allowing the browser to reload the implementation method _ javascript skills

The src of the image img remains unchanged. What should I do if I want the browser to reload the image? When the image address src remains unchanged, let the browser reload the image. In fact, when the src remains unchanged, the browser directly reads the cached javascript code and concatenates? And javascript Object new Date (). getTime () millisecond value into queryString, can prevent being cached

Let the browser reload the image without changing the image address src
In fact, when src remains unchanged, the browser directly reads the cache.

Solution:
Var img_src = 'HTTP: // www.ilsea.net/images/seagull.jpg? T = '+ Math. random ();
In this way, the image address is spliced with a random number, and the src value of img is re-assigned by js, okay