[問題] Javascript無須重載頁面之資料更新
我曾參考過網路上查到的寫法
不過大多都是只能配合 表單中的 checkbox 和 radio 的 onclick事件
再配合一些隱藏button 來做到更新test field中的資料
而不必重新載入頁面
可是我試著想要依照＠中W述的寫法修改了一下原程式
但是是從 A text field 填入資料
然後隨即可以在 B text field中 看到該資料跟著印出來 (兩個text 在同一個 form)
寫法差不多 可是失敗了 目前沒有頭緒 不知道為什麼不行
不知道有沒有大大能夠指點一下 該用什麼技巧才能達能呢?
感謝
下面是我參考的網頁
http://javascript.internet.com/forms/update-order-form-no-page-refresh.html
<!-- Paste this code into an external JavaScript file -->
/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Kevin Hartig :: http://www.grafikfx.net/ */
// Calculate the total for items in the form which are selected.
function calculateTotal(inputItem) {
with (inputItem.form) {
// Process each of the different input types in the form.
if (inputItem.type == "radio") { // Process radio buttons.
// Subtract the previously selected radio button value from the total.
calculatedTotal.value = eval(calculatedTotal.value) -
eval(previouslySelectedRadioButton.value);
// Save the current radio selection value.
previouslySelectedRadioButton.value = eval(inputItem.value);
// Add the current radio button selection value to the total.
calculatedTotal.value = eval(calculatedTotal.value) +
eval(inputItem.value);
} else { // Process check boxes.
if (inputItem.checked == false) { // Item was uncheck. Subtract item
value from total.
calculatedTotal.value = eval(calculatedTotal.value) -
eval(inputItem.value);
} else { // Item was checked. Add the item value to the total.
calculatedTotal.value = eval(calculatedTotal.value) +
eval(inputItem.value);
}
}
// Total value should never be less than 0.
if (calculatedTotal.value < 0) {
InitForm();
}
// Return total value.
return(formatCurrency(calculatedTotal.value));
}
}
// Format a value as currency.
function formatCurrency(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3)) + ',' +
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + '$' + num + '.' + cents);
}
// This function initialzes all the form elements to default values.
function InitForm() {
// Reset values on form.
document.selectionForm.total.value='$0';
document.selectionForm.calculatedTotal.value=0;
document.selectionForm.previouslySelectedRadioButton.value=0;
// Set all checkboxes and radio buttons on form to unchecked.
for (i=0; i < document.selectionForm.elements.length; i++) {
if (document.selectionForm.elements[i].type == 'checkbox' |
document.selectionForm.elements[i].type == 'radio') {
document.selectionForm.elements[i].checked = false;
}
}
}
<!-- Paste this code into the HEAD section of your HTML document
Change the file name and path to match the one you created -->
<script type="text/javascript" src="yourFileName.js"></script>
<!-- Paste this code into the BODY tag -->
<body onload="InitForm();" onreset="InitForm();">
<!-- Paste this code into the BODY section of your HTML document -->
<div align="center">
<table><tr><td>
<form method="POST" name="selectionForm">
<b>Pizza Order</b><br>
Small $10.00
<input type="checkbox" name="Steak" value="10.00"
onclick="this.form.total.value=calculateTotal(this);">
Medium $12.00
<input type="checkbox" name="Chicken" value="12.00"
onclick="this.form.total.value=calculateTotal(this);">
Large $15.00
<input type="checkbox" name="Sushi" value="15.00"
onclick="this.form.total.value=calculateTotal(this);">
<br><br>
<b>Extra Toppings (only one selection allowed):</b> <br>
<input type="radio" name="Sauce" value="0.00"
onclick="this.form.total.value=calculateTotal(this);"> None
<br>
<input name="Sauce" type="radio" value="1.00"
onclick="this.form.total.value=calculateTotal(this);"> Extra Cheese $1.00
<br>
<input type="radio" name="Sauce" value="2.00"
onclick="this.form.total.value=calculateTotal(this);"> Vegetarian $2.00
<br>
<input type="radio" name="Sauce" value="3.00"
onclick="this.form.total.value=calculateTotal(this);"> Meat $3.00
<br>
<br>
<input type="hidden" name="calculatedTotal" value="0">
<input type="hidden" name="previouslySelectedRadioButton" value="0">
<strong>Your total is:</strong>
<input type="text" name="total" readonly onfocus="this.blur();">
</form>
</td></tr></table>
</div>
<p><div align="center">
<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>
by <a href="The" rel="nofollow">http://javascriptsource.com">The JavaScript Source</a></font>
</div><p>
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07/11 13:27, , 1F
07/11 13:27, 1F
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