< script src= "" type= "text/javascript" > < / script >
< script src= "" type= "text/javascript" > < / script >
< script src= "" type= "text/javascript" > < / script >
< script src= "type=" text/javascript "> < / script >
< script src=" type= "text/javascript" > < / script >
< script src= "type=" text/javascript "/ >
< script >
//js < / script >
Why is the last introduction semi-closed? when the browser views source, you can see
< script src= "" type= "text/javascript" / >
< script >
//js < / script >
this part of the code is black, causing the method of js to fail to execute.
but then replace < script src= "" type= "text/javascript" / > with < script src= "" type= "text/javascript" > < / script >.