Here is a triangle:
#header-triangle-right {
position: absolute;
float: right;
top:0px;
right:0;
z-index: 0;
overflow: hidden;
width: 0;
height: 0;
border-top: 400px solid transparent;
border-right: 1000px solid #000000;
}
How can I make this triangle expand to cover 100% of the document when 'border' doesn't allow percentages?