小编pik*_*iku的帖子

可能重复:
mysql_fetch_array()期望参数1是资源,在select中给出boolean

码-

$q="SELECT * FROM tbl_quevote WHERE que_id = '".$qid."' and voteby='".$uid."'";

$result = $mysqli->query($q) or die(mysqli_error($mysqli));
$num_rows = mysql_num_rows($result);

echo $num_rows;

错误: 警告:mysql_num_rows()期望参数1是资源,第13行的C:\ xampp\htdocs\shizin\voting.php中给出的对象
how to check result is empty?

我想设置div背景图像div(w:932,h:148),图像大小是1524*587
,我试图设置它图像不适合div大小我该怎么办？我的代码 -

.header .logo { width:932px; height:148px; background:url(images/logo.jpg) no-repeat center;}

HTML的

<img id="storyimg" src="images/stor.jpg" alt="img" />  
                <ul class="sb_menu">            
                    <li><a href="linkpage.htm" class="newslink1">Wireless Networking at Fortune Inn, Noida</a></li>
                    <li><a href="linkpage.htm" class="newslink2">18th International Conference on Oral & Maxillofacial Surgery</a></li>
                    <li><a href="linkpage.htm" class="newslink3">WiFi deployment at Vellore Institute of Technology</a></li>                        
                </ul>

我希望当用户移动这些li项目时,我想改变图像,如 -

<script>
                $('a.newslink1').bind('mouseover', function() {
                $('img#storyimg').src("images/stor1.jpg");
...same for newslink2 and 3, image will be stor2 and 3

但这不起作用我想我写错了jquery ?????????

HTML的

<div class="hbg">
</div>

some menu items here

jquery for mouser over菜单项 -

function imgchange()
    {
        $('.smenu li').mouseover( function(){
        var src = $(this).find('a').attr('alt');
        $('.hbg').css('background-image', 'url(' + src + ')');
        $(this).find('hbg').attr('title', 'my tootip info');
        });     
    }

我hbg通过鼠标悬停菜单项(ul li)来改变div 的背景图像.但是我想将div(href)绑定到特定页面,这样当用户点击div上的任何地方时它应该重定向到该绑定页面.它在点击li项目时重定向 .
在jquery中有任何属性我们可以将整个div设置为超链接吗？