jquery实现 购物车 信息 级联改变
超级赛亚人 2013-05-15
转载的一个jquery实现购物车信息级联改变的例子，修改了部分js代码，包括去掉几个没有用到的方法，以及修改了验证数字的方法，原来的无法判断几个小数点，现在用正则表达式进行判断。
<!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>jQuery</title>
<link rel="stylesheet" type="text/css" href="style.css" />
<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript">
google.load("jquery", "1.2.6");
</script>
<script type="text/javascript" src="order.js"></script>
</head>
<body>
<table id="order-table">
<tr>
<th>Product Name</th>
<th>Quantity</th>
<th>X</th>
<th>Unit Price</th>
<th>=</th>
<th style="text-align: right;">Totals</th>
</tr>
<tr class="odd">
<td class="product-title">www.corange.cn<em></em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="turface-pro-league-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>340</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="turface-pro-league-row-total" disabled="disabled"> </input></td>
</tr>
<tr class="even">
<td class="product-title"><p>
Turface® Pro League Red - <em>Calcined Clay Top Dressinged</em>
</p>
<p> </p>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="turface-pro-league-red-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>455</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="turface-pro-league-red-row-total" disabled="disabled"> </input>
</td>
</tr>
<tr class="odd">
<td class="product-title">Turface® Quick Dry - <em>Calcined Clay Moisture Absorbent</em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="turface-quick-dry-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>100</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="turface-quick-dry-row-total" disabled="disabled"> </input></td>
</tr>
<tr class="even">
<td class="product-title">Turface® Mound Clay Red - <em>Virgin Red Clay</em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="turface-mound-clay-red-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>40</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="turface-mound-clay-red-row-total" disabled="disabled"> </input>
</td>
</tr>
<tr class="odd">
<td class="product-title">Red Infield Conditioner - <em>Vitrified Clay Top Dressing</em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="diamond-pro-red-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>35</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="diamond-pro-red-row-total" disabled="disabled"> </input></td>
</tr>
<tr class="even">
<td class="product-title">Drying Agent - <em>Calcined Clay Moisture Absorbent</em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="diamond-pro-drying-agent-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>340</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="diamond-pro-drying-agent-row-total" disabled="disabled"> </input></td>
</tr>
<tr class="odd">
<td class="product-title">Professional - <em>Calcined Clay Top Dressing</em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="diamond-pro-professional-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>75</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="diamond-pro-professional-row-total" disabled="disabled"> </input></td>
</tr>
<tr class="even">
<td class="product-title">Top Dressing - <em>Calcined Clay Soil Conditioner</em>
</td>
<td class="num-pallets"><input type="text" class="num-pallets-input" id="diamond-pro-top-dressing-num-pallets"> </input></td>
<td class="times">X</td>
<td class="price-per-pallet">$<span>30</span>
</td>
<td class="equals">=</td>
<td class="row-total"><input type="text" class="row-total-input" id="diamond-pro-top-dressing-row-total" disabled="disabled"> </input></td>
</tr>
<tr>
<td colspan="6" style="text-align: right;">Product SUBTOTAL: <input type="text" class="total-box" id="product-subtotal" disabled="disabled"> </input></td>
</tr>
</table>
</body>
</html>function isNumeric(str) {
if (isInteger(str))
return true;
var re = /^[]{0,1}(\d+)[\.]+(\d+)$/;
if (re.test(str)) {
if (RegExp.$1 == 0 && RegExp.$2 == 0)
return false;
return true;
} else {
return false;
}
}
function isInteger(str) {
var regu = /^[]{0,1}[0-9]{1,}$/;
return regu.test(str);
}
function calcProdSubTotal() {
var prodSubTotal = 0;
$(".row-total-input").each(function() {
var valString = $(this).val() || 0;
prodSubTotal += parseInt(valString);
});
$("#product-subtotal").val(prodSubTotal);
};
$(function() {
$('.num-pallets-input').blur(
function() {
var $this = $(this);
var numPallets = $this.val();
var multiplier = $this.parent().parent().find("td.price-per-pallet span").text();
if ((isNumeric(numPallets)) && (numPallets != '')) {
var rowTotal = numPallets * multiplier;
$this.css("background-color", "white").parent().parent()
.find("td.row-total input").val(rowTotal);
} else {
$this.css("background-color", "#ffdcdc");
$this.parent().parent().find("td.row-total input").val("");
}
;
calcProdSubTotal();
});
}); 
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而且为了用户体验更好，在滑动界面时，这个图标要乖乖地藏起来，不能影响用户操作。我仔细分析了一下，哟，这不就是中午点外卖时用的饿了么上面的购物车按钮么？到了这一步，相信大家都会想到是用触摸事件来实现了。
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