javascript 使用 onchange 调用多个函数
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Calling multiple functions with onchange
提问by user2116986
All this is a little bit over my experience but I have looked everywhere I could, and researched this stuff for 6 hours so far today and am just running into brick walls.
所有这一切都超出了我的经验，但我已经到处寻找，今天到目前为止研究了 6 个小时，但我只是撞到了砖墙。
I have a table, where a user enters two variables and from those two variables 12 different numbers are spit out. The problem those numbers are spit out as plain text strings into readonly text fields, and I need them to be displayed as (US) currency. All of the input fields in the table are using onchange to run the first function which does the calculations, but the second and third functions which I found online I can not get to run.
我有一个表格，用户在其中输入两个变量，然后从这两个变量中吐出 12 个不同的数字。这些数字作为纯文本字符串被吐出到只读文本字段中的问题，我需要它们显示为（美国）货币。表中的所有输入字段都使用 onchange 来运行进行计算的第一个函数，但我在网上找到的第二个和第三个函数无法运行。
HTML:
HTML：
<form name="form" >
<table width="550" border="0">
<tr>
<td width="265" height="30"><div align="right">Number of Business Customers</div></td>
</tr>
<TR>
<td width="265" height="30"><div align="right">Number of Business Clients:</div></td>
<td width="142" div align="center"><input style="font-size:12px;text-align:center;" name="sum1" onChange="updatesum();CurrencyFormatted();CommaFormatted90;" /></td>
<td width="129" div align="center"> </td>
</tr>
<TR>
<td height="30"><div align="right">Average Number of Employees:</td>
<TD div align="center"><input style="font-size:12px;text-align:center;" name="sum2" onChange="updatesum();CurrencyFormatted();CommaFormatted();" /></TD>
<TD div align="center"> </TD>
<TR>
<td height="30"><div align="right">Anticipated Employee Tax Reduction:</div></td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none;" name="sum16" readonly "></TD>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum26" readonly><BR /></TD>
</TR>
<TR>
<td height="30"><div align="right">Potential Payroll Tax Reduction (annually):</div></td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum17" readonly ></TD>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum27" readonly ></TD>
</TR>
<TR>
<td height="30"><div align="right">Potential Payroll Tax Reduction (monthly):</td>
<TD div align="center"><input type="text" style="font-size:12px;text-align:center;border:none" name="sum18" readonly ></td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum28" readonly ></td>
</TR>
<TR>
<td height="30"><div align="right">Pearl Logic Billing (50% of savings, for 12 months):</td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum19" readonly ></td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum29" readonly ></td>
</TR>
<TR>
<td height="30"><div align="right">Sales Agent Monthly Comp (8%):</td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum14" readonly ></td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum24" readonly ></td>
</TR>
<TR>
<td height="30"><div align="right">Sales Agent Total Comp (8%):</td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum15" readonly ></td>
<TD div align="center"><input style="font-size:12px;text-align:center;border:none" name="sum25" readonly ></td>
</TR>
</table>
</form>
Javascript:
Javascript：
function updatesum() {
document.form.sum14.value = ((((((document.form.sum1.value -0)*(document.form.sum2.value -0)*300))/12)/2)*.08);
document.form.sum24.value = ((((((document.form.sum1.value -0)*(document.form.sum2.value -0)*400))/12)/2)*.08);
document.form.sum15.value = (((((((document.form.sum1.value -0)*(document.form.sum2.value -0)*300))/12)/2)*.08)*12);
document.form.sum25.value = (((((((document.form.sum1.value -0)*(document.form.sum2.value -0)*400))/12)/2)*.08)*12);
document.form.sum16.value = 300;
document.form.sum26.value = 400;
document.form.sum17.value = ((document.form.sum1.value -0)*(document.form.sum2.value -0)*300);
document.form.sum27.value = ((document.form.sum1.value -0)*(document.form.sum2.value -0)*400);
document.form.sum18.value = (((document.form.sum1.value -0)*(document.form.sum2.value -0)*300)/12);
document.form.sum28.value = (((document.form.sum1.value -0)*(document.form.sum2.value -0)*400)/12);
document.form.sum19.value = ((((document.form.sum1.value -0)*(document.form.sum2.value -0)*300)/12)/2);
document.form.sum29.value = ((((document.form.sum1.value -0)*(document.form.sum2.value -0)*400)/12)/2);
}
//--></script>
<script type="text/javascript"><!--
function CurrencyFormatted()
{
var i = parseFloat(amount);
if(isNaN(i)) { i = 0.00; }
var minus = '';
if(i < 0) { minus = '-'; }
i = Math.abs(i);
i = parseInt((i + .005) * 100);
i = i / 100;
s = new String(i);
if(s.indexOf('.') < 0) { s += '.00'; }
if(s.indexOf('.') == (s.length - 2)) { s += '0'; }
s = minus + s;
return s;
}
//--></script>
<script type="text/javascript"><!--
function CommaFormatted()
{
var delimiter = ","; // replace comma if desired
var a = amount.split('.',2)
var d = a[1];
var i = parseInt(a[0]);
if(isNaN(i)) { return ''; }
var minus = '';
if(i < 0) { minus = '-'; }
i = Math.abs(i);
var n = new String(i);
var a = [];
while(n.length > 3)
{
var nn = n.substr(n.length-3);
a.unshift(nn);
n = n.substr(0,n.length-3);
}
if(n.length > 0) { a.unshift(n); }
n = a.join(delimiter);
if(d.length < 1) { amount = n; }
else { amount = n + '.' + d; }
amount = minus + amount;
return amount;
}
//--></script>
回答by Boris the Spider
Your functions have an undefined amountvariable. Presumably they just crash with an error.
您的函数有一个未定义的amount变量。据推测，他们只是因错误而崩溃。
First you need to remove those function calls from the onChangelistener.
首先，您需要从onChange侦听器中删除这些函数调用。
Second, change the functions to take an unformatted value and return a formatted one
其次，更改函数以获取未格式化的值并返回格式化的值
function CurrencyFormatted(amount) { //<-- notice the method parameter
var i = parseFloat(amount);
if(isNaN(i)) { i = 0.00; }
var minus = '';
if(i < 0) { minus = '-'; }
i = Math.abs(i);
i = parseInt((i + .005) * 100);
i = i / 100;
s = new String(i);
if(s.indexOf('.') < 0) { s += '.00'; }
if(s.indexOf('.') == (s.length - 2)) { s += '0'; }
s = minus + s;
return s;
}
Now change each of your set calls in your updatesumto first format the value
现在更改您的每个 set 调用updatesum以首先格式化该值
var sum14 = ((((((document.form.sum1.value -0)*(document.form.sum2.value -0)*300))/12)/2)*.08);
var formattedSum14 = CommaFormatted(CurrencyFormatted(sum14));
document.form.sum14.value = sum14;
