Javascript-以2位小数显示总数
Javascript - Show the total in 2 decimal
我使用的是这个脚本：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title></title>
<script language="JavaScript" type="text/javascript">
function CalculateTotal(frm) {
var order_total = 0
// Run through all the form fields
for (var i=0; i < frm.elements.length; ++i) {
// Get the current field
form_field = frm.elements[i]
// Get the field's name
form_name = form_field.name
// Is it a "product" field?
if (form_name.substring(0,4) == "PROD") {
// If so, extract the price from the name
item_price = parseFloat(form_name.substring(form_name.lastIndexOf("_") + 1))
// Get the quantity
item_quantity = parseInt(form_field.value)
// Update the order total
if (item_quantity >= 0) {
order_total += item_quantity * item_price
}
}
}
// Display the total rounded to two decimal places
frm.TOTAL.value = round_decimals(order_total, 2)
var total = round_decimals(order_total, 2);
document.getElementById('tax_amount').value =round_decimals(parseFloat(((8/100)*total)),2);
document.getElementById('total_amount').value =round_decimals((parseFloat(total) + parseFloat(((8/100)*total))),2);
}
function round_decimals(original_number, decimals) {
var result1 = original_number * Math.pow(8, decimals)
var result2 = Math.round(result1)
var result3 = result2 / Math.pow(8, decimals)
return pad_with_zeros(result3, decimals)
}
function pad_with_zeros(rounded_value, decimal_places) {
// Convert the number to a string
var value_string = rounded_value.toString()
// Locate the decimal point
var decimal_location = value_string.indexOf(".")
// Is there a decimal point?
if (decimal_location == -1) {
// If no, then all decimal places will be padded with 0s
decimal_part_length = 0
// If decimal_places is greater than zero, tack on a decimal point
value_string += decimal_places > 0 ? "." : ""
}
else {
// If yes, then only the extra decimal places will be padded with 0s
decimal_part_length = value_string.length - decimal_location - 2
}
// Calculate the number of decimal places that need to be padded with 0s
var pad_total = decimal_places - decimal_part_length
if (pad_total > 0) {
// Pad the string with 0s
for (var counter = 1; counter <= pad_total; counter++)
value_string += "0"
}
return value_string
}
//-->
</script>
</head>
<body>
<div class="calculator">
<div class="calc_top">
<div class="calc_head">recruitment project - pricing calculator</div>
</div>
<div class="calc_body_header">
<div class="calc_product"><strong><em>Process</em></strong></div>
<div class="calc_cost_per_unit" style="width:140px !important;"><em><strong>Cost per Passenger</strong></em></div>
<div class="calc_units"><strong><em>Units</em></strong></div>
</div>
<div class="calc_body_background">
<br class="clearfloat" />
<div class="calc_body">
<div class="calc_product"><strong>Service Charges</strong></div>
<div class="calc_units"></div>
<div class="calc_cost_per_unit"></div>
</div>
<span class="clearfloat" /></span>
<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="emaill@gmail.com">
<input type="hidden" name="button_subtype" value="services">
<input type="hidden" name="no_note" value="0">
<input type="hidden" name="cn" value="Enter shipping address">
<input type="hidden" name="no_shipping" value="2">
<input type="hidden" name="item_name" value='Payment to my company'>
<input type="hidden" name="charset" value="utf-8">
<div class="calc_body">
<div class="calc_product">Advertising - drafting and posting</div>
<div class="calc_units">$8.59</div>
<div class="calc_cost_per_unit"><span class="calc_units" style="width:140px !important;"><INPUT TYPE=TEXT NAME="PROD_ad_8.59" SIZE=3 MAXLENGTH=3 onChange="CalculateTotal(this.form)"></span></div>
</div>
<span class="clearfloat" /></span>
<div class="calc_totals_panel_green">
<div class="calc_totals">
<div class="calc_total_label">TOTAL (excluding fee) $</div>
<div class="calc_cost_per_unit"><INPUT NAME=TOTAL TYPE=TEXT class="total" onFocus="this.form.elements[0].focus()" SIZE=10 /></div>
</div>
<span class="clearfloat" /></span>
<div class="calc_totals">
<div class="calc_total_label">8 % fee</div>
<div class="calc_cost_per_unit"><INPUT NAME="tax_amount" TYPE=TEXT class="total" id="tax_amount" SIZE=10 ></div>
</div>
<span class="clearfloat" /></span>
<div class="calc_totals">
<div class="calc_total_label">TOTAL $</div>
<input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynowCC_LG.gif:NonHosted">
<div class="calc_cost_per_unit"><INPUT NAME="amount" TYPE=TEXT class="total" id="total_amount" SIZE=10 ></div>
</div>
<span class="clearfloat" /></span></div><input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_paynowCC_LG.gif" border="0" name="submit" style="vertical-align:middle" alt="PayPal">
<img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
</div>
<div class="calc_footer">
<div class="calc_footer_text"></div></div>
</div>
</body>
</html>我需要收费8.59美元，再加上8%的费用。总数出来了。9.28125
当处理贝宝支付时，我收到错误，问题是贝宝不接受超过2位小数。
如何转换所有的小数点后两位。
示例：
这是错误的。
http://i271.photobucket.com/albums/jj146/cosmossx/error.jpg
这很好。http://i271.photobucket.com/albums/jj146/cosmossx/good.jpg
感谢
您可以使用javascript number.toFixed(<precision>)，例如运行
var x = 1.23456
x.toFixed(2)
返回1.23
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