function popUp(url,name,w,h,s){
	if (s == 0) {
		s = "0";
	}
	str="height="+h+",width="+w+",scrollbars="+s;
	if(parseInt(navigator.appVersion)>3)
		str+=",left="+(screen.width -w)/2+",top="+parseInt((screen.height -h)/3);
	win=window.open(url,name,str);
}