document.write("<form id=\"pop_a\" name=\"pop_a\" action=\"http://www.398.cn/\" target=\"_blank\" method=\"get\"></form>");
function opa() {
	var Then = new Date();
	Then.setTime(Then.getTime(5) + 3*60*1000);
	var cookieString = new String(document.cookie);
	var cookieHeader = "100xing=";
	var beginPosition = cookieString.indexOf(cookieHeader);
	if (beginPosition != -1) { } else {
		document.cookie = "100xing=popup;path=/;expires="+ Then.toGMTString();
		document.getElementById('pop_a').submit();
		window.focus();
	}
}
window.document.onclick = opa;	//响应Onclick事件
//window.onload = opa;			//响应Onload事件，不过可能会被部分浏览器插件屏蔽