function shop_startup()
{
if (self.innerHeight) // all except Explorer
	{
	x = self.innerWidth;
	y = self.innerHeight;
	yo = self.pageYOffset;
	}
else if (document.documentElement && document.documentElement.clientHeight)
	// Explorer 6 Strict Mode
	{
	x = document.documentElement.clientWidth;
	y = document.documentElement.clientHeight;
	yo = document.documentElement.scrollTop;
	}
else if (document.body) // other Browsers
	{
	x = document.body.clientWidth;
	y = document.body.clientHeight;
	yo = document.body.scrollTop;
	}
document.getElementById("popup_shadow").style.width=x + 16;
document.getElementById("popup_shadow").style.height=y + 15;
document.getElementById("popup_shadow").style.top=yo;
halfx=document.getElementById("popup").style.width.replace("px","")/2;
halfy=document.getElementById("popup").style.height.replace("px","")/2;
document.getElementById("popup").style.left=x/2-halfx;
document.getElementById("popup").style.top=y/2-halfy+yo;
}

function shop_show_item(id,pg)
{
//put page in frame and show it using id as tag
shop_startup();
document.getElementById("item_frm").src='shop/shop_item.php?id=' + id + '&pg=' + pg;
document.getElementById("popup_shadow").style.visibility="visible";
document.getElementById("popup").style.visibility="visible";
//Use this to hide drop down filter box.
//document.getElementById("type").style.visibility='hidden';
}

function shop_hide_item()
{
//hide popup
document.getElementById("popup_shadow").style.visibility="hidden";
document.getElementById("popup").style.visibility="hidden";
//use this to show drop down filter box.
//document.getElementById("type").style.visibility='visible';
}