[英]making two scripts work together for a dropdown menu
我有这个HTML代码
<html>
<head>
<script type="text/javascript">
window.onload = function(){
document.getElementById("shipping-method").onchange = function(){
window.scrollTo(0, 0);
};
};
</script>
<script>
function calc() {
var subtotal = parseFloat(document.getElementById("subtotal").innerHTML.substring(1));
var shipping = parseInt(document.getElementById("shipping-method").value);
if(shipping == 1) {
var total = subtotal+6.95;
document.getElementById("shipping").innerHTML = "$"+6.95;
} else {
var total = subtotal+17.95;
document.getElementById("shipping").innerHTML = "$"+17.95;
}
document.getElementById("total").innerHTML = "$"+total;
}
</script>
</head>
<body>
<select onchange="calc()" class="shipping-method" id="shipping-method">
<option value="">-Choose a shipping method-</option>
<option selected="selected" value="1">normal shipping - $6.95</option>
<option value="2">Priority Shipping - $17.95</option>
</select>
<div class="calculations">
<table>
<tbody><tr>
<td>Subtotal:</td>
<td id="subtotal">$97.00</td>
</tr>
<tr>
<td>Shipping:</td>
<td id="shipping">$6.95</td>
</tr>
<tr class="total">
<td>Total:</td>
<td id="total">$103.95</td>
</tr>
</tbody></table>
</div>
</body>
</html>
下拉菜单位于网页的底部,因此我使用第一个脚本在选择了一个选项并获得了总计之后将用户带到页面顶部,但是两个脚本无法一起使用,我有要删除其中一个以便另一个工作,如何使两个脚本一起工作而没有任何冲突,谢谢。
尝试坚持一下:
function calc() {
var subtotal = parseFloat(document.getElementById("subtotal").innerHTML.substring(1));
var shipping = parseInt(document.getElementById("shipping-method").value);
if(shipping == 1) {
var total = subtotal+6.95;
document.getElementById("shipping").innerHTML = "$"+6.95;
} else {
var total = subtotal+17.95;
document.getElementById("shipping").innerHTML = "$"+17.95;
}
document.getElementById("total").innerHTML = "$"+total;
}
在顶部的函数之前:
window.onload = function(){
document.getElementById("shipping-method").onchange = function(){
window.scrollTo(0, 0);
};
您将覆盖onchange函数。 如果您想做两件事,那么将它们都放在onchange函数中,不要分配两次。
这是一些示例代码(为简洁起见,简称)。
<html>
<head><title>Example</title></head>
<body>
<select id="shipping-method"></select>
<table></table>
<script type="text/javascript">
function calc() {
// do calculations here
}
document.getElementById("shipping-method").onchange = function(){
window.scrollTo(0, 0); // scroll to top
calc(); // call function
};
</script>
</body>
</html>
请注意,我将javascript放在底部,以避免访问不存在的元素。
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