Make a CSS triangle with transparent background on a div with white bg image?

Question

Ok so, I\'m trying to replicate the effect you see here at the bottom of the page, with the back to top button: http://www.ppp-templates.de/tilability/ - After the content a

Answer 1

Here's one way to make a triangle with fairly minimal markup and css:

HTML:

CSS:

.triangle {
    width: 0; 
    height: 0; 
    border-left: 35px solid transparent;
    border-right: 35px solid transparent;
    border-bottom: 35px solid gray;
}

http://jsbin.com/iribib/21