??????? ??? ?? ??? ???? ?? ???? ??? ?????.
??? html ??? ???????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
table{width:350px;border:1px solid #eee;text-align:center;}
.tr2{height:50px;}
input{width:30px;height:20px;text-align: center;}
a{text-decoration:none}
</style>
</head>
<body>
<table cellspacing="0" cellpadding="0" border="1">
<tr>
<th>名稱</th>
<th>單價</th>
<th>數量</th>
<th>總價</th>
</tr>
<tr class="tr2">
<td>手表</td>
<td id="price">1999</td>
<td>
<a href="#" id="a1" class="tp1">-</a>
<input type="text" value="1" id="count" >
<a href="#" id="a2" class="tp2">+</a>
</td>
<td id="total">1999</td>
</tr>
<tr class="tr2">
<td>手機</td>
<td id="price_1">2000</td>
<td>
<a href="#" id="a1" class="tp1">-</a>
<input type="text" value="1" id="count_1">
<a href="#" id="a2" class="tp2">+</a>
</td>
<td id="total_1">2000</td>
</tr>
</table>
</br>
</body>
</html>? ??? ??? ??? ??? 2? ????. ??? ??? ??? ??? ? ???? ??? ???? ??? ?? ?????. , ??? ????? ????? ???? ?? ??? ?? ? ????
??? ?????. ??? ?? ??? ??????
??? ??, ?? ??? ???? ? ??? ???? ??, ? ??, ?? 3?? ????? ??? ???.
? ???? ??? ???? ?? ??, id? ??, ?? ?, id? total ? ?? ?? ??? ??? id? count
???? ? ??? ???????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
table{width:350px;border:1px solid #eee;text-align:center;}
.tr2{height:50px;}
input{width:30px;height:20px;text-align: center;}
a{text-decoration:none}
</style>
</head>
<body>
<table cellspacing="0" cellpadding="0" border="1">
<tr>
<th>名稱</th>
<th>單價</th>
<th>數量</th>
<th>總價</th>
</tr>
<tr class="tr2">
<td>手表</td>
<td id="price">1999</td>
<td>
<a href="#" id="a1" class="tp1" onclick="a2('price','total','count')">-</a>
<input type="text" value="1" id="count" onblur="a3('price','total','count')">
<a href="#" id="a2" class="tp2" onclick="a1('price','total','count')">+</a>
</td>
<td id="total">1999</td>
</tr>
<tr class="tr2">
<td>手機</td>
<td id="price_1">1999</td>
<td>
<a href="#" id="a1" class="tp1" onclick="a2('price_1','total_1','count_1')">-</a>
<input type="text" value="1" id="count_1" onblur="a3('price_1','total_1','count_1')">
<a href="#" id="a2" class="tp2" onclick="a1('price_1','total_1','count_1')">+</a>
</td>
<td id="total_1">1999</td>
</tr>
</table>
</br>
</body>
</html>? ????? ?? ?? ???? ??????. 3?? ????? ??? ??? ? ?? ??? ?? ?? ?? ? ??_1 ? ?? ?? ? ??_1 ?? ?? ? ??_1
??? ??? ??? ?????
<script type="text/javascript">
function a1(td,td2,id){
var price = document.getElementById(td).innerHTML;//獲得單價
var total = document.getElementById(td2).innerHTML;//獲得總價
var v1 = parseInt(document.getElementById(id).value);//獲得數量
document.getElementById(id).value = v1+1; //獲取點擊后的數量
document.getElementById(td2).innerHTML = parseInt(price) * parseInt(v1+1); //總價格等于單價乘以點擊后的數量值
}
</script>?? ?? ??? ???????. ??? ?????
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
table{width:350px;border:1px solid #eee;text-align:center;}
.tr2{height:50px;}
input{width:30px;height:20px;text-align: center;}
a{text-decoration:none}
</style>
<script type="text/javascript">
function a1(td,td2,id){
var price = document.getElementById(td).innerHTML;//獲得單價
var total = document.getElementById(td2).innerHTML;//獲得總價
var v1 = parseInt(document.getElementById(id).value);//獲得數量
document.getElementById(id).value = v1+1;
document.getElementById(td2).innerHTML = parseInt(price) * parseInt(v1+1);
}
</script>
</head>
<body>
<table cellspacing="0" cellpadding="0" border="1">
<tr>
<th>名稱</th>
<th>單價</th>
<th>數量</th>
<th>總價</th>
</tr>
<tr class="tr2">
<td>手表</td>
<td id="price">1999</td>
<td>
<a href="#" id="a1" class="tp1" onclick="a2('price','total','count')">-</a>
<input type="text" value="1" id="count" onblur="a3('price','total','count')">
<a href="#" id="a2" class="tp2" onclick="a1('price','total','count')">+</a>
</td>
<td id="total">1999</td>
</tr>
<tr class="tr2">
<td>手機</td>
<td id="price_1">1999</td>
<td>
<a href="#" id="a1" class="tp1" onclick="a2('price_1','total_1','count_1')">-</a>
<input type="text" value="1" id="count_1" onblur="a3('price_1','total_1','count_1')">
<a href="#" id="a2" class="tp2" onclick="a1('price_1','total_1','count_1')">+</a>
</td>
<td id="total_1">1999</td>
</tr>
</table>
</br>
</body>
</html> ? ??? ??? ?? ?? ??? ???? ???? ??? ??? ????? ??? ??? ??? ??? ?? ???? ???? ???????. ? ??
