Putting text in input field programmatically

Hi,

I am working in the account form. I need to put the value of my variable "str" in the search field as shown below in the picture. So I put the text "TESTACCOUNT" in the variable "str", no issues there.

The issue is getting the var str in that search box. So my goal is to filter the records according to str value.

I have tried the following 2 javascript lines but have no luck with either.

1. Xrm.Page.getAttribute('ShipmentReportsInformation_findCriteria').setValue(str)

2. document.getElementById("ShipmentReportsInformation_findCriteria").value = str;

Any idea on how to achieve this?

Kind regards