Question

<!DOCTYPE html>
<html>
<head>
<script language="javascript" type="text/javascript"> 

function changeValue()
{
    var list, index, element;
    list = document.getElementsByClassName('box-title');
    for (index = 0; index < list.length; ++index){
        element = list[index].innerHTML;
        if(element == "Related Products"){
            list[index].innerHTML = "Choose Extra To make It More Special";
            alert("Page is loaded");
        }
    }
} 
</script>
</head>
<body onload =”changeValue()”>
<div class="box-title">Related Products</div>

</body>
</html>

Answer 1

也许您必须删除onload和=之间的空格并更改奇怪的双引号（也称为“智能引号”）

所以这个：

<body onload =”changeValue()”>

将是这样的：

<body onload="changeValue()">

Answer 2

您是否尝试过更改++运营商？

<!DOCTYPE html>
<html>
<head>
<script language="javascript" type="text/javascript"> 

function changeValue()
{
 var list, index, element;
 list = document.getElementsByClassName('box-title');
 for (index = 0; index < list.length; index++)
 {
  element = list[index].innerHTML;
    if(element == "Related Products")
{
  list[index].innerHTML = "Choose Extra To make It More Special";
  alert("Page is loaded");
}
}

} 
</script>
</head>
<body onload =”changeValue()”>
<div class="box-title">Related Products</div>

</body>
</html>

Answer 3

有很多原因可能无法正常工作。

例如，浏览器可能不支持getElementsByClassName()。

它的javascript代码可以告诉我它为什么不起作用

3 个答案: