我正在尝试做一些奇特的事情。我已经成功编写了代码，以便在填写小表单并单击提交按钮时显示数据库中的结果。结果显示在表单的正下方。但我觉得如果页面能自动向下滚动到包含已填写表单结果的 div，那就太好了。我想我必须使用 jquery 或 ajax 来实现这一点。由于我对它们一无所知，因此我在互联网上搜索复制粘贴代码。但它们都不起作用。
单击提交按钮时，页面将重新加载以从数据库中获取结果。我已经获得了当页面从网络重新加载时向下滚动到 div 的代码，但问题是......即使您提交按钮，滚动也会发生没有点击。因此，有人可以给出仅在单击提交按钮时以及重新加载页面后向下滚动到 div 的代码吗？
代码是这样的
<form name="searchdonor" action="" id="form" method="POST" align="center" enctype="application/x-www-form-urlencoded">
--- ------ ------
--- ------ ------
--- ------ ------
</form>
<input type="submit" name="submit" id="submit" value="Submit" onclick="return(searchval()); ">
//the div i want to scroll down is below one
<div class="col-sm-8" id="what">
</div>
这是 html 和 php-mysqli 中的完整代码
<div class="col-sm-4">
<h1 class="register-title">Search a Donor</h1>
<div id="wrapper">
<div id="chatbox">
<form name="searchdonor" action="" id="form" method="POST" align="center" enctype="application/x-www-form-urlencoded">
<table id="results">
<tr><td><h4>Country:</h4></td><td>     
<select id="slct1" name="country" onchange="populate1(this.id,'slct2')">
<option value="">--Select--</option>
<option value="India">India</option>
</select></td></tr>
<tr><td><h4>State:</h4></td><td>     
<select id="slct2" name="state" onchange="populate2(this.id,'slct3')">
<option value="">--Select--</option>
</select></td></tr>
<tr><td><h4>District:</h4></td><td>     
<select id="slct3" name="district" onchange="populate3(this.id,'slct4')">
<option value="">--Select--</option>
</select></td></tr>
<tr><td><h4>City:</h4></td><td>     
<select id="slct4" name="city">
<option value="">--Select--</option>
</select></td></tr>
<tr><td><h4>Blood group:</h4></td><td>     
<select name="bloodgroup">
<option value="">--Select--</option>
<option value="A+">A+</option>
<option value="A-">A-</option>
<option value="B+">B+</option>
<option value="B-">B-</option>
<option value="O+">O+</option>
<option value="O-">O-</option>
<option value="AB+">AB+</option>
<option value="AB-">AB-</option>
</select></td></tr>
</form>
</table><br />
<input type="submit" name="submit" id="submit" value="Submit" onclick="return(searchval());">
</div>
</div>
</div>
<div class="col-sm-2">
</div>
</div>
<div class="dropdownwrap">
<?php
if(isset($_POST['submit'])){
$country=$_POST['country'];
$state=$_POST['state'];
$district=$_POST['district'];
$city=$_POST['city'];
$bloodgroup=$_POST['bloodgroup'];
?>
<div class="row"><br />
<div class="col-sm-2">
</div>
<div class="col-sm-8" id="what">
<a class="what"></a>
<?php echo "<h4 align='center'> Donors in <b>".$city."</b> for <b>".$bloodgroup."</b> are</h4>";?>
</div>
<div class="col-sm-2">
</div>
</div>
<div class="row">
<div class="col-sm-2">
</div>
<div class="col-sm-8">
<div class="table-responsive">
<table id="tablepaging" class="table" align="center">
<thead><hr />
<tr>
<th><b>Full Name</b></th>
<th><b>Contact Number</b></th>
</tr>
</thead>
<tbody>
<?php
$connect = mysqli_connect('localhost', 'root', '', 'blood'); if (mysqli_connect_errno()) echo "Failed to connect to MySQL: " . mysqli_connect_error();
$query="SELECT * FROM users WHERE country='$country' && state='$state' && district='$district' && city='$city' && bloodgroup='$bloodgroup' && activity='available'";
$result=mysqli_query($connect,$query) or die('Error, query failed');
mysqli_close($connect);
if (mysqli_num_rows($result) == 0) {
echo"<h3 align=\"center\">Sorry, No Donors Found</h3>";
}
elseif($result)
{
while ($row = mysqli_fetch_array($result)){
echo"<tr>";
echo"<td>".$row["firstname"]." ".$row["lastname"]."</td>";
echo"<td>".$row["phonenumber"]."<br />".$row["secondnumber"]."</td>";
}
echo"</tr>";
}}
?>
</tbody>
</table>
<div id="pageNavPosition" align="center"></div>
</div>
</div>
<div class="col-sm-2">
</div>
</div>
</div>
</div>
