使用jQuery从页面中抓取图像

So basically what I want to do is grab links to images within a page and convert them to images. Right now, I have code that will grab any link within a post on the forums and converts them to images, but I want it more specific than that. I want to be able to grab images using the main 4 web image extensions (.jpg, .gif, .png, .bmp). I'm new to jQuery so I'd really love some help on this. Here's my code that I have so far:So basically what I want to do is grab links to