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我正在創建一個動態選擇表單。基本上,用戶從select中選擇一個選項,然後根據他們選擇的選項將它放入數據對象,然後根據他們以前的答案生成新的選擇。在他們回答3個關於他們車輛選擇的問題後,它打印出他們的車輛選擇。刪除動態選擇的子節點
我遇到的問題是有能力在飛行中更改以前的選項。我想讓他們能夠改變以前的選擇,它會刪除以後的選擇
例如。用戶首先選擇Car,Ford並顯示模型選擇。如果用戶返回並將汽車更換爲卡車。我想刪除福特和車型選擇。這裏是代碼的一部分,我有保存數據並創建新的選擇動態
var data=new Object();// create a new data object to hold info
data['init']=['Car','Truck','SUV'];
data['Car']=['Audi','Dodge','Ford','Volkswagon'];
data['Audi']=['A4','TT','R8'];
data['Dodge']=['Charger','Challenger','Stealth'];
data['Ford']=['Focus','Fusion','Mustang'];
data['Volkswagon']=['Jetta','GTI','Beetle'];
data['Truck']=['Dodge Truck','Ford Truck','Toyota Truck'];
data['Dodge Truck'] = ['Ram-1500','Ram-2500','Ram-3500'];
data['Ford Truck'] = ['F-150','F-250','Ranger'];
data['Toyota Truck'] = ['Tundra','Tacoma'];
data['SUV']=['Dodge SUV','Ford SUV','Toyota SUV'];
data['Dodge SUV'] = ['Durango','Journey','Caliber'];
data['Ford SUV'] = ['Escape','Edge','Explorer'];
data['Toyota SUV'] = ['Rav4','Highlander','4runner'];
var hold = data['init'];//Sets data to 'init' by default
var selectedArray = [];//This array holds the selected options (to be used to display the vehicle name)
function init(){//call first to create the first select box and populate with 'init'
firstSelect = document.createElement('select');
firstSelect.setAttribute("onChange","createSelect(this.value)");
createSelect('init');
}
//Main create function for select boxes
function createSelect(value){
selectHold = value;//sets selectHold to the value of the selected item (this will be used for displaying the name in disName)
//This just prevents it from adding "Car, Truck or SUV to the selectedArray
if(value != 'init' && value != 'Truck' && value != 'Car' && value != 'SUV' && value != 'Select your vehicle options'){
selectedArray.push(selectHold);
}
hold=data[value];// sets this holder to the value of the selected item for the if statement
if(hold){ //just checks to see if hold exists
var selEle = document.createElement('select');//creates new select element
//gives selEle onchange function
selEle.setAttribute("onChange","createSelect(this.value)");
//Creates the "default" option. Forcing them to pick something.
var defaultOpt = document.createElement('option');
var vehInfo = document.createTextNode("Select your vehicle options");
defaultOpt.appendChild(vehInfo);
selEle.appendChild(defaultOpt);
//Populates the options and adds it to the document
for(var i = 0, l = hold.length; i < l; i++){
var newOpt = document.createElement('option');
newOpt.appendChild(document.createTextNode(hold[i]));
newOpt.setAttribute('value',hold[i]);
selEle.appendChild(newOpt);
}
//put select on the page
document.getElementById('top-container').appendChild(selEle);
}
else{ //if not, then put out final form
disName(selectHold,selectedArray);//call disName function an dpass it the value of selectHold
}
}
HTML:
<div id="top-container">
<h1>Awesome<br/>
Car<br/>
Picker</h1>
</div>
<div id="middle-container">
<h2>Your vechle choice:</h2>
</div>
<div id="bottom-container">
<div id="mail-form">
<form name='mail-form'>
<label>Name</label>
<input name="name" autofocus>
<label>Email</label>
<input name="email">
<label>Credit Card number</label>
<input name="cc">
<input id="submit" name="submit" value="Submit" onClick="validate()">
</form>
</div>
</div>
<body>
我在想什麼是檢查,看看是否選擇是父節點(頂層容器)的lastChild。如果不是,那麼刪除那個孩子,直到它只是選擇被改變,並且選擇落在它之前。
有什麼建議嗎? 謝謝!
如果我分配到「createSelect」功能的ID那不是給每個新選擇一個Id?這不會刪除所有具有該ID的選擇嗎? – 2012-04-10 13:48:32
也許爲'createSelect'函數創建另一個參數來傳入要使用的ID,例如'selModel','selMake','selYear'等... – Travesty3 2012-04-10 13:52:22