function enterGoPage(obj, event) {
	var event = event ? event : (window.event ? window.event : null);
	if (event.keyCode == 13) {
		goPageFun(obj);
	}
}

function goPageFun(obj) {
	var goPageId = obj.getAttribute("goPageId");
	var page = document.getElementById(goPageId + "goPage").value;
	var totalPage = obj.getAttribute("totalPage");
	var callBack = obj.getAttribute("callBack");
	page = page.replace(/(^[\s]*)|([\s]*$)/g, "");
	if (page == "" || page <= 0 || isNaN(page)) {
		alert("请输入有效的页！");
		return false;
	}
	if (page > totalPage) {
		page = totalPage;
	}
	eval(callBack + "(" + page + ")");;
}

function appendPageHtml(id, currentPage, totalPage, callBack) {
	var comments = "<div class=\"u-page\">";
	if (currentPage > 1) {
		comments += "<a class=\"next\" href=\"javascript:"+callBack+"(1);\">首页</a>";
		comments += "<a class=\"next\" href=\"javascript:"+callBack+"("+ (currentPage - 1);
		comments += ");\">上一页</a>";
	} else {
		comments += "<a class=\"pre noPage\">首页</a> <a hidefocus=\"hidefocus\" ";
		comments += "class=\"pre noPage\">上一页</a>";
	}
	comments += "<ul id=\"bookpage-a\">";
	var start = currentPage - 2;
	if (start <= 0)
		start = 1;
	var end = start + 5;
	if (end > totalPage)
		end = totalPage;
	for (var i = start; i < end + 1; i++) {
		comments += "<li";
		if (currentPage == i)
			comments += " class=\"crt\"";
		comments += "><a href=\"javascript:"+callBack+"(" + i + ");\" pageno=\"";
		comments += i + "\">" + i + "</a></li>";
	}
	comments += "</ul>";
	if (currentPage < totalPage) {
		comments += "<a class=\"next\" href=\"javascript:"+callBack+"(";
		comments += (currentPage + 1) + ");\">下一页</a>";
		comments += "<a class=\"next\" href=\"javascript:"+callBack+"(";
		comments += totalPage + ");\">尾页</a>";
	} else {
		comments += "<a class=\"pre noPage\">下一页</a><a class=\"pre noPage\">尾页</a>";
	}
	comments += "<a><input type=\"test\" id=\"" + id + "goPage\" name=\"goPage\" ";
	comments += "style=\"width: 20px;\" onkeyup=\"enterGoPage(this, event);\" totalPage=\"";
	comments += totalPage + "\" callBack=\"" + callBack + "\" goPageId=\"" + id + "\"></a>";
	comments += "<a><input type=\"button\" value=\"go\" onclick=\"goPageFun(this)\" ";
	comments += "totalPage=\"" + totalPage + "\" callBack=\"" + callBack + "\" goPageId=\"" 
	comments += id + "\"></a>";
	comments += "</div>";

	document.getElementById(id).innerHTML = comments;
}