var win
function newWindow(location, width, height, left, top, scrollbar) {
		closePopup();
	var options = ((scrollbar) ? 'scrollbars='+scrollbar+(((top) || (left) || (height) || (width)) ? ',' : '') : '') +
				  ((top) ? 'top='+top+(((left) || (height) || (width)) ? ',' : '') : '') +
				  ((left) ? 'left='+left+(((height) || (width)) ? ',' : '') : '') +
				  ((height) ? 'height='+height+((width) ? ',' : '') : '') +
				  ((width) ? 'width='+width : '');
	win = window.open(location,'',options);
}
function closePopup() {

	if( win != null ) {
		win.close();
	}
}