function centreWindow() {	
	getWidth = screen.availWidth - 10;
	getHeight = screen.availHeight -30;
	widthPos = (getWidth-w) / 2;
	heightPos = (getHeight-h) / 2;
	self.moveTo(widthPos,heightPos);
}

function pagePopUp(URL,w,h,scrollbars) {
	eval("page = window.open(URL, '', 'toolbar=0,scrollbars=' + scrollbars + ',location=0,statusbar=0,menubar=0,resizable=0,width=" + w + ",height=" + h + "');");
}