var x = 0;
var y = 0;

window.onload = function()
{
if(window.innerWidth)
{
x = window.innerWidth;
y = window.innerHeight;
}
else
{
x = document.body.clientWidth;
y = document.body.clientHeight;
}

x = x - 320;
y = y - 100;

setpos();
}


function setpos()
{
fixed_div = document.getElementById('rb_fix_div');

fixed_div.style.left = x;
fixed_div.style.top = y + document.body.scrollTop;


window.setTimeout("setpos()", 10);
}