javascript - .style .backgroundColor 错误

Question

这是我的脚本（在 Selenium IDE 中）：

storeEval |   var form =window.document.forms[0];

elements = form.elements; for (var i = 0; i < elements.length; i++) 
{window.document.getElementsByTagName("elements").item(i).style.backgroundColor}
| result

这是我的错误：

[error] Threw an exception: window.document.getElementsByTagName("elements").item(i) is null

Answer 1

Your code is looking for elements of type element, like this:

<element>Something</element>

but there aren't any in the document.

Did you really mean to search for <element> elements? It looks like the content of your loop wants to be something like this:

elements.item(i).style.backgroundColor

Answer 2

Instead of this:

window.document.getElementsByTagName("elements").item(i).style.backgroundColor

Just use this:

elements[i].style.backgroundColor