<!--  hide script from old browsers
if( document.images )
{
	com_300 = new Image();
	com_300.src = "../images/com_300.jpg";
	com_19a = new Image();
	com_19a.src = "../images/com_19a.jpg";
	com_28a = new Image();
	com_28a.src = "../images/com_28a.jpg";
	com_28he = new Image();
	com_28he.src = "../images/com_28he.jpg";
	com_3500 = new Image();
	com_3500.src = "../images/com_3500.jpg";
	com_4500 = new Image();
	com_4500.src = "../images/com_4500.jpg";
	com_6500 = new Image();
	com_6500.src = "../images/com_6500.jpg";
}

function portswap(rollname, number) 
{
	if( document.images )
	{
		document[rollname].src = eval("com_" + number + ".src");
	}
}


// --> end script hide