如果选择了特定的单选按钮，如何显示窗体

How to show a form if a particular radio button is selected

本文关键字：何显示 显示 窗体 选择 单选按钮 如果      更新时间：2023-09-26

我想在选择单选按钮时显示一个特定的窗体。该代码似乎对我来说很好，只是当页面加载时，它显示两个表单，而不是在输入标签中检查其值的一个表单

<?php
function print_form()
{
$newform = "
<body>
<section>
<div><strong>Select your Quantity Format</strong></div>
    <input type='"radio'" id='"radio1'" name='"radios'" value='"radio1'" checked onclick='"show()'">
    <label for='"radio1'">Per Unit</label>
    <input type='"radio'" id='"radio2'" name='"radiOS'" value='"radio2'" onclick='"show()'">
    <label for='"radio2'">Per Box</label>
<form method='"post'" id='"unit'" action='"{$_SERVER['PHP_SELF']}'" >
<table border=1 cellpadding=3 cellspacing=3 width='30%'>
<tr>
<th colspan=2 align='left' bgcolor='#EAEAEA'>Add Medicine/Item Details</th>
</tr>
<tr>
<td>Medicine/Item Name</td>
<td><input type='"text'" name='"Medicine/Item_Name'"></td>
</tr>
<tr>
<td>Company Name</td>
<td><input type='"text'" name='"Company_Name'"></td>
</tr>
<tr>
<td>Stowage Rack No.</td>
<td><input type='"text'" name='"Rack'" onkeypress='"return isNumberKey(event)'" ></td>
</tr>   
<tr><td colspan=2><input type='"submit'" value='"Add Record'">
    <input type='"hidden'" value='"true'" name='"unit'"></td></tr>
</table></form>
<form method='"post'" id='"box'" action='"{$_SERVER['PHP_SELF']}'" >
<table border=1 cellpadding=3 cellspacing=3 width='30%'>
<tr>
<th colspan=2 align='left' bgcolor='#EAEAEA'>Add Medicine/Item Details</th>
</tr>
<tr>
<td>Medicine/Item Name</td>
<td><input type='"text'" name='"Medicine/Item_Name'"></td>
</tr>
<tr>
<td>Company Name</td>
<td><input type='"text'" name='"Company_Name'"></td>
</tr>
<tr>
<td>Minimum Stock (Boxes)</td>
<td><input type='"text'" name='"Minimum_Stock_box'" onkeypress='"return isNumberKey(event)'"></td>
</tr>
<tr>
<td>Stowage Rack No.</td>
<td><input type='"text'" name='"Rack'" onkeypress='"return isNumberKey(event)'" ></td>
</tr>       
<tr><td colspan=2><input type='"submit'" value='"Add Record'">
    <input type='"hidden'" value='"true'" name='"box'"></td></tr>
</table></form>
</section>
<body>
";
return $newform;    
}

if(isset($_POST['unit']))
{
save_record_unit();
}
else if(isset($_POST['box']))
{
save_record_box();
}
else
{
print print_form();
}
?>

我为此使用的JavaScript如下

function show()
{       
var radios = document.getElementsByName("radios");
var unit =  document.getElementById("unit");
var box =  document.getElementById("box");
        box.style.display = 'block';
for(var i = 0; i < radios.length; i++) {
 radios[i].onclick = function() {
    var val = this.value;
    if(val == 'radio1' ){
        unit.style.display = 'block';
        box.style.display = 'none';
    }
    else if(val == 'radio2'){
         unit.style.display = 'none';
         box.style.display = 'block';
    }    
  }
 }
}

您似乎忘记了在开头隐藏一个。您可以使用style='display:none'直接在html中执行，也可以在css类中执行，或者在页面加载时直接使用jquery执行。

这里是您的php函数：

function show()
{   
var radios = document.getElementsByName("radios");
var unit =  document.getElementById("unit");
var box =  document.getElementById("box");
        box.style.display = 'none';
for(var i = 0; i < radios.length; i++) {
 radios[i].onclick = function() {
    var val = this.value;
    if(val == 'radio1' ){
        unit.style.display = 'block';
        box.style.display = 'none';
    }
    else if(val == 'radio2'){
         unit.style.display = 'none';
         box.style.display = 'block';
    }    
  }
 }
}
.alert{ color:white; background-color:red;padding:2em;margin:2em;}
<body>
  <?php
function print_form(){
$newform="
<section>
<div><strong>Select your Quantity Format</strong></div>
    <input type='"radio'" id='"radio1'" name='"radios'" value='"radio1'"  onclick='"show();'" checked>
    <label for='"radio1'">Per Unit</label>
    <input type='"radio'" id='"radio2'" name='"radios'" value='"radio2'" onclick='"show();'">
    <label for='"radio2'">Per Box</label>
<form method='"post'" id='"unit'" action='"'" >
<table border=1 cellpadding=3 cellspacing=3 width='30%'>
<tr>
<th colspan=2 align='left' bgcolor='#EAEAEA'>Add Medicine/Item Details</th>
</tr>
<tr>
<td>Medicine/Item Name</td>
<td><input type='"text'" name='"Medicine/Item_Name'"></td>
</tr>
<tr>
<td>Company Name</td>
<td><input type='"text'" name='"Company_Name'"></td>
</tr>
<tr>
<td>Stowage Rack No.</td>
<td><input type='"text'" name='"Rack'" onkeypress='"return isNumberKey(event);'" ></td>
</tr>   
<tr><td colspan=2><input type='"submit'" value='"Add Record'">
    <input type='"hidden'" value='"true'" name='"unit'"></td></tr>
</table></form>
    
<form method='"post'" id='"box'" action='"'" >
<table border=1 cellpadding=3 cellspacing=3 width='30%'>
<tr>
<th colspan=2 align='left' bgcolor='#EAEAEA'>Add Medicine/Item Details</th>
</tr>
<tr>
<td>Medicine/Item Name</td>
<td><input type='"text'" name='"Medicine/Item_Name'"></td>
</tr>
<tr>
<td>Company Name</td>
<td><input type='"text'" name='"Company_Name'"></td>
</tr>
<tr>
<td>Minimum Stock (Boxes)</td>
<td><input type='"text'" name='"Minimum_Stock_box'" onkeypress='"return isNumberKey(event);'"></td>
</tr>
<tr>
<td>Stowage Rack No.</td>
<td><input type='"text'" name='"Rack'" onkeypress='"return isNumberKey(event);'" ></td>
</tr>       
<tr><td colspan=2><input type='"submit'" value='"Add Record'">
    <input type='"hidden'" value='"true'" name='"box'"></td></tr>
</table></form>
</section>
<script> show();</script>";
return $newform;
}
if(isset($_POST['unit']))
{
    //save_record_unit();
    echo "<div class='"alert'">save_record_unit</div>";
}
else if(isset($_POST['box']))
{
    //save_record_box();
    echo "<div class='"alert'">save_record_box</div>";
}
else
{
print print_form();
}
?>
</body>

我把<script> show();</script>放在函数print_form（）的末尾，以便每次php 调用函数时都能由javascript执行

好的，检查我的测试，你会发现它是有效的，可以随意查看源代码：
你的测试页面或此处

function show()
{   
var radios = document.getElementsByName("radios");
var unit =  document.getElementById("unit");
var box =  document.getElementById("box");
        box.style.display = 'none';
for(var i = 0; i < radios.length; i++) {
 radios[i].onclick = function() {
    var val = this.value;
    if(val == 'radio1' ){
        unit.style.display = 'block';
        box.style.display = 'none';
    }
    else if(val == 'radio2'){
         unit.style.display = 'none';
         box.style.display = 'block';
    }    
  }
 }
}
show();//to start hidding box
<section>
<div><strong>Select your Quantity Format</strong></div>
    <input type="radio" id="radio1" name="radios" value="radio1"  onclick="show();" checked>
    <label for="radio1">Per Unit</label>
    <input type="radio" id="radio2" name="radios" value="radio2" onclick="show();">
    <label for="radio2">Per Box</label>
<form method="post" id="unit" action="" >
<table border=1 cellpadding=3 cellspacing=3 width='30%'>
<tr>
<th colspan=2 align='left' bgcolor='#EAEAEA'>Add Medicine/Item Details</th>
</tr>
<tr>
<td>Medicine/Item Name</td>
<td><input type="text" name="Medicine/Item_Name"></td>
</tr>
<tr>
<td>Company Name</td>
<td><input type="text" name="Company_Name"></td>
</tr>
<tr>
<td>Stowage Rack No.</td>
<td><input type="text" name="Rack" onkeypress="return isNumberKey(event);" ></td>
</tr>   
<tr><td colspan=2><input type="submit" value="Add Record">
    <input type="hidden" value="true" name="unit"></td></tr>
</table></form>
    
<form method="post" id="box" action="" >
<table border=1 cellpadding=3 cellspacing=3 width='30%'>
<tr>
<th colspan=2 align='left' bgcolor='#EAEAEA'>Add Medicine/Item Details</th>
</tr>
<tr>
<td>Medicine/Item Name</td>
<td><input type="text" name="Medicine/Item_Name"></td>
</tr>
<tr>
<td>Company Name</td>
<td><input type="text" name="Company_Name"></td>
</tr>
<tr>
<td>Minimum Stock (Boxes)</td>
<td><input type="text" name="Minimum_Stock_box" onkeypress="return isNumberKey(event);"></td>
</tr>
<tr>
<td>Stowage Rack No.</td>
<td><input type="text" name="Rack" onkeypress="return isNumberKey(event);" ></td>
</tr>       
<tr><td colspan=2><input type="submit" value="Add Record">
    <input type="hidden" value="true" name="box"></td></tr>
</table></form>
</section>

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