script type="text/javascript">
function updatePrice() {
var price = document.getElementById("product").value;
document.getElementById("price").innerHTML="<p>PRICE: " + price + "</p>";
}
</script>
</head>
<br>
<label >Shirt Type</label>
<body onload="updatePrice()">
<select id="product" onchange="updatePrice()">
<option id="basic" value="€20.00"> Basic Shirt (€20.00)</option>
<option id="poly" value="€25.00">Poly-Cotton Blend (€25.00)</option>
<option id="gildan" value="€28.00">Gildan Cotton (€28.00)</option>
<option id="organic" value="€30.00">Organic Cotton (€30.00)</option>
</select>
<div id="price"><p>PRICE: €XX.XX</p></div>
<label >Shirt Size</label>
<select id="size" onchange="updatePrice()">
<option id="None">Choose Size</option>
<option id="Small">Small</option>
<option id="Medium">Medium</option>
<option id ="Large">Large</option>
<option id ="XL">XL</option>
<option id ="XXL"value= "€2.00">XXL</option>
<option id ="XXXL" value="€3.00">XXXL</option>
</select>
我有一个销售 T 恤的网站,上面的代码允许根据所选棉花类型更新价格,效果很好。我希望 XXL 和 XXXL 尺寸的衬衫价格更高,并在价格中更新该费用。如何将元素的值添加在一起以显示一个价格,谢谢。
最佳答案
正确的代码是
<script type="text/javascript">
function updatePrice() {
var price = document.getElementById("product").value;
var size_price = document.getElementById("size").value;
var a=parseInt(price);//parsed type price
var b=parseInt(size_price);//parsed size price
if(size_price != "null")//if the value selected is not null then add the prize
{
var fin_price = a+b; //add the prices
}
else //if the value selected is null then fin_prize=price
{
var fin_price = price;
}
document.getElementById("price").innerHTML="<p>PRICE: " + fin_price + "</p>";
}
</script>
<br>
<label >Shirt Type</label>
<body onload="updatePrice()">
<select id="product" onchange="updatePrice()">
<option id="basic" value="20.00"> Basic Shirt (€20.00)</option>
<option id="poly" value="25.00">Poly-Cotton Blend (€25.00)</option>
<option id="gildan" value="28.00">Gildan Cotton (€28.00)</option>
<option id="organic" value="30.00">Organic Cotton (€30.00)</option>
</select>
<div id="price"><p>PRICE: €XX.XX</p></div>
<label >Shirt Size</label>
<select id="size" onchange="updatePrice()">
<option id="None" value="null">Choose Size</option>
<option id="Small" value="0.00">Small</option>
<option id="Medium" value="0.00">Medium</option>
<option id ="Large" value="0.00">Large</option>
<option id ="XL" value="0.00">XL</option>
<option id ="XXL"value= "2.00">XXL</option>
<option id ="XXXL" value="3.00">XXXL</option>
</select>
注意:如果您想添加来自不同值属性的数字,则不鼓励使用带有字母的数字(即 €20.00)。还可以将值属性与选择下拉列表的所有选项一起使用
关于javascript - 动态更新价格,多种选择,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26961015/