[英]show hidden div based on dropdown selection
I have a Member Registration Form that contains a dropdown. 我有一个包含下拉列表的会员注册表。 It is for events so firstly they enter their membership details, select an event and then the number of tickets they wish to purchase.
这是为了事件,所以他们首先输入他们的会员资料,选择一个事件,然后选择他们想要购买的门票数量。 The options are as follows:
选项如下:
What I want to happen is that because "Members" are FREE to attend, I want to keep the payment div hidden unless they select Member + xxxx. 我想要发生的是因为“会员”可以免费参加,我希望隐藏付款div,除非他们选择会员+ xxxx。
I am a complete novice when it comes to javascript/jquery but I can understand most of it when its written. 当谈到javascript / jquery时,我是一个完整的新手,但是当它写完时我能理解它的大部分内容。
I have a JSfiddle ( http://jsfiddle.net/bEuRh/ ) created with some basics but I need a hand writing the script. 我有一个JSfiddle( http://jsfiddle.net/bEuRh/ )创建了一些基础知识,但我需要一个手写脚本。 Some of the code is below:
部分代码如下:
<div id="tickets">
<label for="CAT_Custom_255276">Number of Tickets: <span class="req">*</span></label>
<select class="cat_dropdown" id="CAT_Custom_255276" name="CAT_Custom_255276">
<option value=" ">-- Please select --</option>
<option value="Member">Member</option>
<option value="Member + 1 Guest">Member + 1 Guest</option>
<option value="Member + 2 Guests">Member + 2 Guests</option>
<option value="Member + 3 Guest">Member + 3 Guests</option>
</select>
</div>
<div id="payMethod">
<div class="header">
PAYMENT METHOD
</div>
<div id="payOptions">
<div id="payInfo">
<div id="pay0" class="paymentinfo">
<p>PAYMENT INFO OPTION 1</p>
</div>
<div id="pay1" class="paymentinfo">
<p>PAYMENT INFO OPTION 2</p>
</div>
<div id="pay2" class="paymentinfo">
<p>PAYMENT INFO OPTION 3</p>
</div>
</div>
</div>
</div>
If anyone could please assist, that would be greatly appreciated. 如果有人可以请求协助,那将非常感激。
Here is a working example using pure JS: 这是一个使用纯JS的工作示例:
//when a new option is selected...
document.getElementById('CAT_Custom_255276').addEventListener('change', function () {
//hide all .paymentinfo
Array.prototype.forEach.call(document.querySelectorAll('.paymentinfo'), function (e) {
e.style.display = 'none';
});
//get the selected index - 2 (first two do not impact display)
var sel = +this.selectedIndex - 2;
//if it is one of the last 3 selected...
if (sel >= 0) {
//display payMethod and the chosen individual options
document.getElementById('payMethod').style.display = 'block';
document.getElementById('pay' + sel).style.display = 'block';
}
else {
//otherwise hide payMethod
document.getElementById('payMethod').style.display = 'none';
}
});
I like Raymond's approach of changing the HTML to: 我喜欢Raymond改变HTML的方法:
<option value="0">-- Please select --</option>
<option value="1">Member</option>
<option value="2">Member + 1 Guest</option>
<option value="3">Member + 2 Guests</option>
<option value="4">Member + 3 Guests</option>
Do that, and then use this jQuery to keep the payment div hidden unless they select the option for more than one member: 这样做,然后使用此jQuery保持支付div隐藏,除非他们为多个成员选择选项:
$('.cat_dropdown').change(function() {
$('#payMethod').toggle($(this).val() >= 2);
});
I like this approach for several reasons: 我喜欢这种方法有几个原因:
it makes sense to give each option a value that corresponds to the meaning of the selection. 为每个选项赋予与选择含义相对应的值是有意义的。 For example,
Member + 1 Guest
has an associated value of 2
. 例如,
Member + 1 Guest
的关联值为2
。
it balances the code between the markup and the javascript in a meaningful, simpler way. 它以有意义,更简单的方式平衡标记和javascript之间的代码。
Here's a jsfiddle to illustrate: http://jsfiddle.net/martco/3TvwV/4/ 这里有一个jsfiddle来说明: http : //jsfiddle.net/martco/3TvwV/4/
http://jsfiddle.net/bEuRh/5/ http://jsfiddle.net/bEuRh/5/
I'll get the value when select change is detected and compare.. 检测到选择更改后我会得到值并进行比较..
EDIT: 编辑:
$("select").change(function () {
var str = "";
str = parseInt($(this).val());
$("#payMethod").toggle(str >= 2)
});
In HTML, i changed the value to integer... 在HTML中,我将值更改为整数...
<option value="0">-- Please select --</option>
<option value="1">Member</option>
<option value="2">Member + 1 Guest</option>
<option value="3">Member + 2 Guests</option>
<option value="4">Member + 3 Guests</option>
if you wanna show individual div... you can try this one.. 如果你想展示个人...你可以尝试这个...
It's better to attache events in script instead of onchange in html but then I'd have to add a lot of JS code just to make it browser compatible: 最好在脚本中附加事件而不是在html中使用onchange ,但是为了使浏览器兼容,我必须添加大量的JS代码:
<script type="text/javascript">
function showInfo(){
var divs=document.querySelectorAll(".paymentinfo"),
i,
// next line assumes only one element with this style
select=document.querySelectorAll(".cat_dropdown")[0],
index;
for(i=0;i<divs.length;i++){
divs[i].style.display="none";
}
//get the index of the select
index=select.selectedIndex-2;
if(index>-1){
divs[index].style.display="block";
document.getElementById('payMethod').style.display = 'block';
return
}
document.getElementById('payMethod').style.display = 'none';
}
</script>
<div id="tickets">
<label for="CAT_Custom_255276">Number of Tickets: <span class="req">*</span></label>
<select class="cat_dropdown" id="CAT_Custom_255276" name="CAT_Custom_255276" onchange="showInfo();">
<option value=" ">-- Please select --</option>
<option value="Member">Member</option>
<option value="Member + 1 Guest">Member + 1 Guest</option>
<option value="Member + 2 Guests">Member + 2 Guests</option>
<option value="Member + 3 Guest">Member + 3 Guests</option>
</select>
</div>
<div id="payMethod" style="display:none">
<div class="header">
PAYMENT METHOD
</div>
<div id="payOptions">
<div id="payInfo">
<div id="pay0" class="paymentinfo" style="display:none">
<p>PAYMENT INFO OPTION 1</p>
</div>
<div id="pay1" class="paymentinfo" style="display:none">
<p>PAYMENT INFO OPTION 2</p>
</div>
<div id="pay2" class="paymentinfo" style="display:none">
<p>PAYMENT INFO OPTION 3</p>
</div>
</div>
</div>
</div>
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