var iOpened=0
function fnNewWin(sUrl,w,h){

	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;

	sParams = 'height='+h+',width='+w+',top='+wint+',left='+winl;
	
	if (iOpened==1) {
		//if window has previously been opened
		//but is now closed then make new window 
		newWin.closed?fnNewWinCreate(sUrl,sParams):iOpened=iOpened
	}
	//if newWin exists focus it else create new window
	window.newWin?newWin.focus():fnNewWinCreate(sUrl,sParams)
	
}
function fnNewWinCreate(sUrl,sParams){
	newWin=window.open(sUrl,"subwin",sParams)
	//flag up that win has been created
	iOpened=1
}

var requestedpdffile="";

function newletter(newletter){
	fnNewWin('../../forms/newsletter.php?newsletter=' + newletter,375,250);}