Wednesday, April 25, 2012

Why does setting the `right` CSS attribute push an element to the left?

I have a very basic page with two elements, an outer green box, and inner blue box. I am confused as to why setting the right attribute on the inner box would move it to the left? Furthermore I am confused as to why right:0 would not align the boxes right edge to the right edge of the parent box? Here is my short example page...



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<style type="text/css">
#outer {
background-color : green;
width : 500px;
height : 500px;
}

#inner {
position : relative;
background-color : blue;
height : 400px;
width : 400px;
top : 10px;
right : 20px;
}
</style>
</head>
<body>
<div id="outer">
<div id="inner">


</div>

</div>
</body>
</html>




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