I found a quick and easy way to re-size images with CSS by keeping your image’s aspect ratio. This is very quick you can use it in less than 5 minutes, lets proceed

Lets say you want to show large images on your web page with maximum 200 pixels width, blog or forums just create the following css class into your styling css file:

.resize {
width: 200px;
height : auto;
}

.resize {
width: auto;
height : 300px;
}

Second class will re-size the images by keeping height as 300 pixels. You can use the following classes in <IMG> tags like:

<img src="http://mywbsite.com/myphoto.jpg"  alt="my photo" />

The above solution is always better than putting width and height attributes into the <IMG> tag. Hope it works out for you too.

Anyways you can use any image re-size script with server side script technology like PHP. If you find any fast script, please share a link in comments.