Reducing external images sizes in blog ?

Hello

i run a blog that users post articles inside it.

sometimes a user could insert an article that contains an external image which is pretty big in dimensions.

is there any script that would decrease the size of these posted images automatically so it doesn't screw the website design ?

thanks in advance

 

you could add this to your css to see if that helps

img {
width: 300px;
height:300px;
}

change the width and height to what you want them to be

i haven't tested this and may not work, but it works with normal images in a html page

 

ok i'll give it a shot .. thanks in advanced