document getelementbyid null

TypeError document. getElementById (...) is null error cause, typeerrornull Today, I wrote a simple page for testing. After writing JavaScript, I always reported TypeError document. getElementById (...) is null error. The Code has been read several

Document. all is a proprietary attribute of IE 4.0 and later versions. It is a group of all objects in the current document, including not only object objects visible on the page, but also invisible objects, for example, html annotations. In the

View code 1 $. Ajax ({2 type: "Post", // Request Method3 URL: "text.txt", // address, which is the Action Request Path4 cache: false,5 Data: "text", // data type text xml json script jsonp6 success: function (MSG) {// The returned parameter is

However, if you need to find a specific element in the document, the most effective method is getelementbyid (). However, when using getelementbyid, The results may be different for different browsers. CopyCode The Code is as follows: text1: Text2

Use your brain as a browser to execute the following code twice: IE6 and IE9: Copy codeThe Code is as follows: function testFunc (){ Alert ('test ') } $ (Function (){ Var g = document. getElementById, W = window. testFunc; // G Alert (typeof (g

1. 'null' is null or not an object: Add the defer = true attribute to it,That is: 2. document. getElementById is null Cause: var titab = document. getElementById ("titletab"); no object retrievedSolution:1. Add alert (titab) under the error

However, if you need to find a specific element in the document, the most effective method is getElementById ().However, when using getElementById, The results may be different for different browsers.Copy codeThe Code is as follows:Text1:Text2:I

Today, I wrote a webpage. When I want to dynamically display data from other programs in the background when loading onLoad on the page, it is always null to use document. getElementById to get the control object. But check that this id does exist.

// Code snippet VaR d = Document. getelementbyid ("billno "); Document is a built-in object that can be directly used on the page without the need to declare and define it. Getelementbyid: Purpose: Generally, the ID on the page is unique and used

Difference between document. forms [0] And getElementByName in JavaScript, getelementbyid First, let's look at an example: Copy codeThe Code is as follows: testtest testtest testtest When document. forms [0] has one or more form forms in the HTML