Access popup window element JavaScript

Question

I have written the following code to load a popup(List B NewForm.aspx) when a List A NewForm.aspx is submitted. The popup has a div.

var dialogOptions = SP.UI.$create_DialogOptions();
dialogOptions.url = "someURL";
dialogOptions.width = 750;
dialogOptions.height = 500; 
dialogOptions.dialogReturnValueCallback = Function.createDelegate( null, CloseCallback); 
SP.UI.ModalDialog.showModalDialog(dialogOptions);

In the List B NewForm.aspx, I have added script to access the div. But by following code part div cannot be accessed. Any suggestions please.

document.getElementById("divID");

Answer 1

Please try the following:

1. Check whether you have added all necessary js references in your List B NewForm.aspx

2. On page load of List B NewForm.aspx, add an alert('Page loaded'), and see whether this loads, if this works, then you might be referencing a wrong div or div which is not available in List B NewForm.aspx.