//Function to preload and swap rollover button in main navigation
if (document.images) {
	playclipOff = new Image
	playclipOver = new Image

	playclipOff.src = "images/playbutton_off.gif"
	playclipOver.src = "images/playbutton_over.gif"
	}

else {
	playclipOff = ""
	playclipOver = ""
	document.playclipRO = ""
	}

//Function to open popup window
function custWindow(doc,w,h,align,valign,scroll) {
if (custWindow.arguments.length < 6) {
	var scroll = 'no'
	}
if (custWindow.arguments.length < 4) {
	var align = 'c'
	var valign = 'm'
	}
topPos=0
leftPos=0
if (screen) {
	if (align == 'c') {
		leftPos = screen.width/2 - w/2
		} else {
		if (align == 'r') {
			leftPos = screen.width - w - 12
			}
		}
	if (valign == 'm') {
		topPos = screen.height/2 - h/2
		} else {
		if (valign == 'b') {
			topPos = screen.height - h - 5
				}
			}
		}
	custWin = window.open (doc,'custWin','toolbar=no,location=no,status=no,scrollbars='+scroll+',resizable=yes,width='+w+',height='+h+',left='+leftPos+',top='+topPos+'')
	custWin.document.close()
	custWin.focus()
}