分页脚本及应验分页文本框的输入

<%@ page contentType="text/html;charset=UTF-8"%>
<%@ include file="/common/taglibs.jsp"%>
<a href="javascript:jumpPage(1)">首页</a>
<s:if test="%{#request.page.pageNo>1}">
?<a href="javascript:jumpPage(${page.prePage})">上一页</a>
</s:if>
<s:if test="%{#request.page.hasNext}">
?<a href="javascript:jumpPage(${page.pageNo+1})">下一页</a>
</s:if>
<span><a href="javascript:jumpPage(${page.totalPages})">末页</a> </span>

<input type="hidden" name="page.orderBy" id="orderBy"
?value="${page.orderBy}" />
<input type="hidden" name="page.order" id="order" value="${page.order}" />
<input type="hidden" name="totalPage" id="totalPage"
?value="${page.totalPages}" />
<input name="page.pageNo" type="text" value="${page.pageNo}" id="pageNo" />
<span id="pages">/${page.totalPages}</span>
<a href="#" onclick="checkPage()" id="go"><img
?src="images/tip11_go.gif" /></a>

?

?

function checkPage(){
?
?var page=parseInt($("#pageNo").val());
?var totalPage=parseInt($("#totalPage").val());
?if(isNaN(page))
??alert("只能输入正整数");
?else if(page>totalPage)
??alert("输入页数比总页数大");
?else
??$("#mainForm").submit();
}