[英]Hide input boxes based on drop down selection
I want a drop down menu at the top of the page to determine how many boxes are then showing on the page. 我想要页面顶部的下拉菜单来确定页面上将显示多少个框。
If the user selects 1, only 1 table shows If the user selects 2, 2 tables show 如果用户选择1,则仅显示1个表如果用户选择2,则显示2个表
I have added the code so hopefully it makes more sense 我添加了代码,所以希望它更有意义
<body>
<p>Please select number of puppies:</p>
<p>
<select>
<option value="1">1</option>
<option value="2">2</option>
</select>
</p>
<form id="form1" name="form1" method="POST" action="<%=MM_editAction%>">
<p>Puppy 1: </p>
<p> </p>
<table width="330" border="0">
<tr>
<td>Name: </td>
<td><input type="text" name="PuppyName1" /></td>
</tr>
<tr>
<td>Colour: </td>
<td><input type="text" name="PuppyColour1" /></td>
</tr>
<tr>
<td>Sex:</td>
<td>
<select name="PuppySex1" id="PuppySex1">
<option value=" "> </option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td>Microchip/DNA Profile:</td>
<td>
<select name="PuppyMicrochip1" id="PuppyMicrochip1">
<option value="No">No</option>
<option value="Microchip">Microchip</option>
<option value="DNA Profile">DNA Profile</option>
</select>
</td>
</tr>
<tr>
<td><p>Microchip/DNA Number:</p></td>
<td> </td>
</tr>
</table>
<p>Puppy 2:</p>
<table width="330" border="0">
<tr>
<td>Name: </td>
<td><input type="text" name="PuppyName2" /></td>
</tr>
<tr>
<td>Colour: </td>
<td><input type="text" name="PuppyColour2" /></td>
</tr>
<tr>
<td>Sex:</td>
<td>
<select name="PuppySex2" id="PuppySex2">
<option value=" "> </option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td>Microchip/DNA Profile:</td>
<td>
<select name="PuppyMicrochip2" id="select2">
<option value="No">No</option>
<option value="Microchip">Microchip</option>
<option value="DNA Profile">DNA Profile</option>
</select>
</td>
</tr>
<tr>
<td><p>Microchip/DNA Number:</p></td>
<td>
<input name="PuppyMicrochipNum2" type="text"
id="PuppyMicrochipNum2" />
</td>
</tr>
</table>
very common to get jQuery answers but it's really not that comprehensive with standalone JavaScript 获得jQuery答案非常普遍,但对于独立JavaScript来说却并不全面
note: add the attribute style="display:none;"
注意:添加属性style="display:none;"
to the second table 到第二张桌子
var select = document.getElementsByTagName("select")[0];
select.onchange=function(){
if(select.value=="2"){
document.getElementsByTagName("table")[1].style.display="inline";
}else{
document.getElementsByTagName("table")[1].style.display="none";
}
}
however you should alternatively use below, as you may have more select and table elements in your document 但是,您也可以在下面使用,因为您的文档中可能包含更多的select和table元素
var select = document.getElementById("selectnopuppies");
select.onchange=function(){
if(select.value=="2"){
document.getElementById("secondpuppytable").style.display="inline";
}else{
document.getElementById("secondpuppytable").style.display="none";
}
}
<p>Please select number of puppies:</p>
<p>
<select id="selectnopuppies">
<option value="1">1</option>
<option value="2">2</option>
</select>
</p>
<form id="form1" name="form1" method="POST" action="<%=MM_editAction%>">
<p>Puppy 1:</p>
<p> </p>
<table width="330" border="0">
<tr>
<td>Name:</td>
<td>
<input type="text" name="PuppyName1" />
</td>
</tr>
<tr>
<td>Colour:</td>
<td>
<input type="text" name="PuppyColour1" />
</td>
</tr>
<tr>
<td>Sex:</td>
<td>
<select name="PuppySex1" id="PuppySex1">
<option value=" "></option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td>Microchip/DNA Profile:</td>
<td>
<select name="PuppyMicrochip1" id="PuppyMicrochip1">
<option value="No">No</option>
<option value="Microchip">Microchip</option>
<option value="DNA Profile">DNA Profile</option>
</select>
</td>
</tr>
<tr>
<td>
<p>Microchip/DNA Number:</p>
</td>
<td> </td>
</tr>
</table>
<div id="secondpuppytable" style="display:none;">
<p>Puppy 2:</p>
<table width="330" border="0">
<tr>
<td>Name:</td>
<td>
<input type="text" name="PuppyName2" />
</td>
</tr>
<tr>
<td>Colour:</td>
<td>
<input type="text" name="PuppyColour2" />
</td>
</tr>
<tr>
<td>Sex:</td>
<td>
<select name="PuppySex2" id="PuppySex2">
<option value=" "></option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td>Microchip/DNA Profile:</td>
<td>
<select name="PuppyMicrochip2" id="select2">
<option value="No">No</option>
<option value="Microchip">Microchip</option>
<option value="DNA Profile">DNA Profile</option>
</select>
</td>
</tr>
<tr>
<td>
<p>Microchip/DNA Number:</p>
</td>
<td>
<input name="PuppyMicrochipNum2" type="text" id="PuppyMicrochipNum2" />
</td>
</tr>
</table>
</div>
You can do something like this: 您可以执行以下操作:
When you select 1st option, it will show you firSt table and for 2nd it will show you both tables. 选择第一个选项时,它将显示第一个表,第二个选项时将显示两个表。
$("table").hide();
$("select option").change(function(){
Val = $(this).val();
If(Val ==1) {
$("table")[0].show();
$("table")[1].hide();
} else {
$("table").show();
}
});
Given that option 1 should show table 1, option 2 show table 1 and 2, and so on. 鉴于选项1应该显示表1,选项2应该显示表1和2,依此类推。
Try this: 尝试这个:
$('#dropdown').change(function(){
var dropdown = $(this);
var tables = $('.tableSelector');
tables.hide();
tables.slice(0,dropdown.val()).show();
});
Working jsfiddle: http://jsfiddle.net/v5TTz/ 可用的jsfiddle: http : //jsfiddle.net/v5TTz/
I have tagged all tables with a css class "tableSelector", then everytime the dropdown changes value, I show the number of tables corresponding to the current value of the dropdownlist. 我已经使用css类“ tableSelector”标记了所有表,然后每次下拉列表更改值时,我都会显示与下拉列表的当前值对应的表数。 This solution requires the tables to be positioned in the correct order in the DOM. 此解决方案要求将表以正确的顺序放置在DOM中。
However, in my ears, this sounds like a case for templates, like jQuery templates or Hoganjs. 但是,在我耳中,这听起来像是jQuery模板或Hoganjs之类的模板的案例。
I have modified your code... It's working now... try this... 我已经修改了您的代码...现在可以正常运行...试试这个...
<html>
<head>
<title>Sample</title>
<script type="text/javascript">
function go()
{
var Count = document.getElementById("selCount").options[document.getElementById("selCount").selectedIndex].value;
if(Count==1)
{
document.getElementById("Puppy1").style.display = '';
document.getElementById("Puppy2").style.display = 'none';
}
if(Count==2)
{
document.getElementById("Puppy1").style.display = '';
document.getElementById("Puppy2").style.display = '';
}
}
</script>
</head>
<body>
<p>Please select number of puppies:</p>
<p>
<select onchange = "go()" id="selCount">
<option value="1">1</option>
<option value="2">2</option>
</select>
</p>
<form id="form1" name="form1" method="POST" action="<%=MM_editAction%>">
<p>Puppy 1: </p>
<p> </p>
<table width="330" border="0" id="Puppy1">
<tr>
<td>Name: </td>
<td><input type="text" name="PuppyName1" /></td>
</tr>
<tr>
<td>Colour: </td>
<td><input type="text" name="PuppyColour1" /></td>
</tr>
<tr>
<td>Sex:</td>
<td><select name="PuppySex1" id="PuppySex1">
<option value=" "> </option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td>Microchip/DNA Profile:</td>
<td><select name="PuppyMicrochip1" id="PuppyMicrochip1">
<option value="No">No</option>
<option value="Microchip">Microchip</option>
<option value="DNA Profile">DNA Profile</option>
</select></td>
</tr>
<tr>
<td><p>Microchip/DNA Number:</p></td>
<td> </td>
</tr>
</table>
<p>Puppy 2:</p>
<table width="330" border="0" id="Puppy2">
<tr>
<td>Name: </td>
<td><input type="text" name="PuppyName2" /></td>
</tr>
<tr>
<td>Colour: </td>
<td><input type="text" name="PuppyColour2" /></td>
</tr>
<tr>
<td>Sex:</td>
<td><select name="PuppySex2" id="PuppySex2">
<option value=" "> </option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td>Microchip/DNA Profile:</td>
<td><select name="PuppyMicrochip2" id="select2">
<option value="No">No</option>
<option value="Microchip">Microchip</option>
<option value="DNA Profile">DNA Profile</option>
</select></td>
</tr>
<tr>
<td><p>Microchip/DNA Number:</p></td>
<td><input name="PuppyMicrochipNum2" type="text" id="PuppyMicrochipNum2" /></td>
</tr>
</table>
</body>
</html>
A little bit of javascript: 一点点JavaScript:
<script>
function showtable(o){
if(o.value==2){document.getElementById('table2').style.display='block';}
else{document.getElementById('table2').style.display='none';}
}
</script>
<p>Please select number of puppies:</p>
<p>
<select onchange="showtable(this)">
<option selected value="1">1</option>
<option value="2">2</option>
</select>
<table id='table2' width="330" border="0" style="display:none">
HTML Changes HTML更改
<select onchange="showForm(this.options[this.selectedIndex]);">
Why it's needed ? 为什么需要它?
For listening the select box value change . 为了收听选择框的值更改。
<table width="330" border="0" class="puppy">
Added class=puppy
attribute for readability . 添加了class=puppy
属性以提高可读性。 For hiding table
element will be generic and error prone. 用于隐藏table
元素将是通用的,并且容易出错。
Javascript Changes JavaScript变更
function showForm(option){ //option user has selected. 函数showForm(option){//已选择选项用户。 var val = parseInt(option.value); var val = parseInt(option.value); //form elements in a document. //在文档中形成表单元素。 var forms = document.getElementsByClassName("puppy"); 可变形式= document.getElementsByClassName(“ puppy”);
for(var i=0,total=forms.length;i<total;i++){
var form = forms[i];
var display = form.style.display;
if(i<val && display == "none"){
form.style.display = "block";
}else if(i >= val && display != "none"){
form.style.display = "none";
}
}
} }
Live Demo @ http://jsfiddle.net/A3eFz/31/ 现场演示@ http://jsfiddle.net/A3eFz/31/
Please try with following example, hope this helps. 请尝试以下示例,希望对您有所帮助。
<label for ="amount">Please select number of parameter</label><br/>
<select name="amount" id="amount" title="amount">
<option value="00">0</option>
<option value="01">1</option>
<option value="02">2</option>
<option value="03">3</option>
<option value="04">4</option>
<option value="05">5</option>
<option value="06">6</option>
<option value="07">7</option>
<option value="08">8</option>
<option value="09">9</option>
<option value="10">10</option>
</select>
<form name = "AddQuery" id = "AddQuery" method = "POST" action = "submit.php">
<div id="groups">
</div>
<div id="other">
</div>
<input type="submit" value="Submit">
</form>
<script type="text/javascript" src="js/jquery-1.4.3.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#amount').change(function(){
$('#groups').empty();
var group = '';
var number = parseInt($(this).val());
for(var i=0;i<number;i++){
group += '<div id="group">' +
'<label for="name['+i+']">Name'+i+'</label> '+
'<input name="name'+i+'" type="text" id="name'+i+'" value="">' +
'<label for="type['+i+']">Type'+i+'</label> '+
'<input name="type'+i+'" type="text" id="type'+i+'" value="">' +
'</div>';
}
$('#groups').append(group);
$('#other').empty();
var other = '';
other +='<div id="other"><input type="hidden" name="n" id ="n" value="'+number+'"/></div>';
$('#other').append(other);
});
});
</script>
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