A quick solution to the problem of JS being empty or not object

Source: Internet
Author: User

This article mainly introduced the JS is empty or is not the object problem quick resolution method. Need friends can come to the reference, I hope to help you

1. Added a parameter <script language= "JavaScript" defer= "defer" > 2. ' null ' is empty or not an object: <script type= "Text/javascript" > Add a defer=true attribute to try, that is: <script type= "Text/javascript" defer= True> 3. document.getElementById is null reason: Var Titab=document.getelementbyid ("Titletab"); Object resolution: 1. Add alert below the Error statement (Titab Debug the statement to see if a message box pops up 2. If there is no pop-up, check the HTML code for the existence of the "Id=titletab" <table> tags (be careful oh, a letter can not be wrong) 3. If the label exists, consider the <script > Position of the code snippet, remember to include a similar getelement code <script> code snippet must appear after the element in HTML that is to say, you put the <script> code snippet in
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