所以我的任务是创建发票。我能够做到这一点，并用它来计算总额、税金和小计。
我现在需要做的是获取我在文本区域中输入的值。
<textarea input type ="text" name = "textarea" id = "textarea" rows = "12" cols = "180"></textarea>
我将把迄今为止的代码放在下面。它会计算，但我希望输入的值位于我在“当前发票”下方创建的大文本区域中。
类似于(下面的内容将进入文本区域)
---Item Code--- ---Item Name----- ----Item Cost---- ----Quantity----
(user input) (user input) user input user input
--- Subtotal---- ---tax------- ----Total------
(calculation) (calculation) (calculation)
我将向您展示我的代码
<html>
<head>
<meta charset = "utf-8">
<h1>Invoice Manager</h1>
<style type "text/css">
div {position: absolute;
top: 200px;
left: 90px;
z-index: 1;}
l
</style>
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<script type = "text/javascript">
function computeCost(){
var code = document.getElementById("code").value;
var code = code; // item code
var itemName = document.getElementById("itemName").value;
var itemName = itemName; // item name
var cost = document.getElementById("cost").value;
var cost = cost; // calculate cost
var quantity = document.getElementById("quantity").value;
var quantity = quantity; // calculate quantity of items
var subtotal = document.getElementById("subtotal").value;
var subtotal = cost * quantity; // multiplying cost by quantity = subtotal
var tax = document.getElementById("tax").value;
var tax = subtotal * .07; // multiplying subtotal by tax(.7) = amount of tax owed
var total = document.getElementById("total").value;
var total = tax + subtotal; //adding tax to subtotal = total value
var textContent = document.getElementById("textarea").value;
document.getElementById("subtotal").value = subtotal;
document.getElementById("tax").value = tax;
document.getElementById("total").value = total;
document.getElementById("textContent").value = textContent;
}
</script>
<body>
<form action = ""method = "post" name = "myForm">
<table>
<tr>
<td align="right">Item Code:</td>
<td align="left"><input type="text" name = "code" id="code" /></td>
</tr>
<tr>
<td align="right">Item Name:</td>
<td align="left"><input type="text" name = "itemName" id="itemName" /></td>
</tr>
<tr>
<td align="right">Item Cost:</td>
<td align="left"><input type="text" name = "cost" id="cost" /></td>
</tr>
<tr>
<td align="right">Quantity:</td>
<td align="left"><input type="text" name = "quantity" id="quantity" /></td>
</tr>
</table>
<br></br> <br></br>
<font size = "5">Current Invoice</font>
<hr style = "height:2px;border:none;color:#333;background-color:#333;"></hr>
<textarea input type ="text" name = "textarea" id = "textarea" rows = "12" cols = "180"></textarea>
</label>
<table>
<tr>
<td align="right">Subtotal:</td>
<td align="left"><input type="text" name = "subtotal" id="subtotal" /></td>
</tr>
<tr>
<td align="right">Sales Tax:</td>
<td align="left"><input type="text" name = "tax" id="tax" /></td>
</tr>
<tr>
<td align="right">Total:</td>
<td align="left"><input type="text" name = "total" id="total" /></td>
</tr>
</table>
</form>
<form>
<div id="AddItemButton">
<td align = "left"><input type="button" value= "Add Item" id = "add" onclick="computeCost();"/>
<td>
</div>
</form>
</body>
</html>
有什么想法吗？我正在努力在文本区域中输入值。
我尝试调用“getElementById(input = 'text').value;”但这没有用。
如有任何帮助，我们将不胜感激。
编辑:
这是我的文本区域
看起来工作正常
document.getElementById('textarea').value = "--" + code + "--" + " " + " " + "--" + "--" + itemName + "--" + " " + " " + "--" + cost +"--" + " " + " " + "--" + quantity + "--" + " " + " " + "--" + subtotal + "--" + " " + " " + " " + "--" + tax + "--" + " " + " " + "--" + total + "--";
这可能不是正确的代码。
最佳答案
如果您想对文本区域进行一些格式化，您可以使用 TINYMCE
您可以在文本区域附加 html 元素。
关于Javascript - 将计算值输入发票的文本区域，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26498634/