Disable a Relationship tab

Question

Hello Team, 
 I need to disable a relationship tab as the User selects a option button on the form. 
 Detailed Info: I have a option button on a form. Once the user selects this option, a tab from relationship below should be disabled. I am trying to work this out on the OnChange Field event for the option button but its not working. I am able to do the same on the OnFormPopulate event but it wont work on real time, only when the form is refreshed, it works. 
 I need a solution where i can be able to disable enable the relationship tab as soon as the user selects or deselects the option button. 
 Please advise. 
 Thanks in advance, 
 Mithun

AngelaIp · Answer

Hi Mithun, 
 that&acute;s an interesting use case. I assume you need a combination of the onFormPopulate Method with an onChange/onClick Method. 
 I made a very quick&dirty test to disable a tab on button click: 
 var rel_dom = parent.relationships.document; var relId = "6B5481B4B83A48CBA0C958ECD5407B12"; // id of RelationshipType var style = "display: none;"; var tab = rel_dom.querySelector('li[data-id="' + relId + '"]'); 
 tab.setAttribute("style", style); 
 // todo: select another tab if disabled tab is active. 
 return; 
 This one just disabled the tab. But the tab content itself of course still will be visible when users already selected the tab. But I assume it should be possible to automatically switch to another tab. Would be cool if you could share your results!