Regular expression to select image tags with images whose names end in spacer.

<img src="[\w\/\-\_]*spacer.[jpeg|jpg|gif|png]+[^>]*/?>

Selects inline styles. I purposely excluded quotation marks from the character set because they cause the expression to select attributes of other tags on the same line.

style="[\s\d\w\.\-\:\;]+"

Edit: Here's a shorter way of accomplishing the same thing:

style="[^"']+"

It's probably worth adding a space before the expression to make sure that you don't leave in unnecessary spaces in the tag and to avoid selecting things that are not styles, such as the bold part of

Regular expression to select all font tags in a HTML document.

?(FONT|font)[^>]*>

Resizes an image to fit into its container, depending on whether the width or height is longer, yet keeping the aspect ratio. Copied from a comment on sitepoint.com.

ffunction resizeImgOO(el) 
{ 
        function imgRatio()
        { 
                return (el.height / el.width); 
        } 
        function holderRatio()
        { 
                return (el.offsetParent.offsetHeight / el.offsetParent.offsetWidth); 
        } 
        function fitToContainer()
        { 
                if(imgRatio>holderRatio) 
                { 
                        el.height = el.offsetParent.offsetHeight; 
                } 
                else 
                { 
                        el.width = el.offsetParent.offsetWidth;   
                } 
        }
        
        this.imgRatio = imgRatio; 
        this.holderRatio = holderRatio; 
        this.resize = fitToContainer; 
}
var img = new resizeImgOO(document.getElementById('yourImgId'));
img.resize();