The border property is used to set the width of an image border. This property can have a value in length or in %. A width of zero pixels means no border.
You can try to run the following code to set the width of image border:
<html> <head> </head> <body> <img style = "border:0px;" src = "/css/images/logo.png" /> <br /> <img style = "border:4px dashed green;" src = "/css/images/logo.png" /> </body> </html>