i think you can use the famous IOL Technique
Just create a formula text field and make the "Allow html tags" as checked
Paste the below code on the formula
"<img qbu=\"module\" src=\"/i/clear2x2.gif\" " & "onload=\"javascript:if(typeof QBU=='undefined'){QBU={};$.getScript('" & URLRoot() &"db/" &Dbid() &
"?a=dbpage&pagename=module.js&rand='+Math.random())}\">" Create a page in Home-Settings-Pages-New Page and have the below code $(document).ready(function(){ alert("Page is Loaded !!") }) Save the page as module.js
Write whatever code you wish to have in the module.js.
You can rename the page , but the same page name should be called on the formula too.
I hope this will solve your issue!!