Implementation code for JS file size judgment_image special effects

Method one, use ActiveX control to implement:

Copy the code The code is as follows:

This method can be used in IE. If there are any shortcomings, there will be a security prompt. Changing the name to .hta will block the security prompts.
Method 2, use the dynsrc attribute of img:

Copy the code The code is as follows:

This method can be used in IE6, but cannot be used in IE7, IE8, Firefox, and chrome.
Method three, use the fileSize of img:

Copy the code The code is as follows:

< ;legend>Image source
LocalRemote:

Preview area

It can be used in IE, FireFox, and chrome, but it only determines the size of the image file.