function aboutUsImg(which_img, imgCopy) {
var a = document.getElementById("aboutus_img");
a.src = "/_images/about-us/"+which_img+".jpg";
var b = document.getElementById("image_copy");
b.innerHTML = imgCopy;
}


function checkWindowPosition() {
	checkWindowPosID = setInterval("subNavMove()",500)
}
 

function subNavMove() {
if (navigator.appName == "Microsoft Internet Explorer")
	{
	var a = document.documentElement.scrollTop;
	}
else
	{
	var a = window.pageYOffset;
	}

var c = document.getElementById("about_us_img");

if (a >= 930)
	{
	c.style.position = "fixed";
	var_pos_top = 10;
	c.style.top = var_pos_top + "px";
	}
else
	{
	c.style.position = "relative";
	var_pos_top = a + 10;
	c.style.top = "";
	}
}