function newwin(url, w, h, winname) {

	if ( !winname ) {
	
		winname = "NEWWIN";
		
	}
	
	xpos = ((screen.availWidth - w) / 2);
	
	ypos = ((screen.availHeight - h) / 2);
	
	winprops = "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width="+w+",height="+h+",left="+xpos+",top="+ypos;
	
	win = window.open(url, winname, winprops);
	
	win.focus();
	
}

function confirmIt(url) {

	if ( confirm("Weet u zeker dat u wilt verwijderen?") ) {

		return true;

	} else {

		return false;
		
	}

}