Find Element With JavaScript When UserControl Used Multiple Times

Maybe I am making this more complicated than it is but for the life of me I can not find any information on it.  Basically what I want to do is place a hidden element on a user control and write JavaScript that will read that value.  The problem I have is that it needs to be able to work when there is more than one user control present on the page.

I know that I can not place the JavaScript code on the user control itself because it should only be added to the page once.  I currently have all of my JavaScript in a file and I add it to the page using Page.ClientScript.RegisterClientScriptInclude.  So the question is how do I write JavaScript that can be placed in the file and read the value of a hidden element on the user control that is calling the function and make sure I am reading the right control.

Maybe there is another way to accomplish what I am trying to do so I will try to give this a little more context.  The user control I am creating contains a RadToolBar that has buttons the user will press to perform various actions.  One of the buttons will perform a delete operation so I want to confirm the user really wants to delete it.  My current plan is to use RadWindow to display a confirmation message.  The code that I have found to do this is:

            var btn; 
            function onToolBarClientButtonClicking(sender, args) { 
                var button = args.get_item(); 
 
                if (button.get_commandName() == "DeleteSelected") { 
                    if (document.getElementById('hdn_Hosp').value) { 
                        args.set_cancel(true); 
                        btn = args.get_item(); 
                        confirmFn('Delete ' + document.getElementById('hdn_Hosp').value + '?'); 
                    } 
                } 
            } 
 
            function confirmFn(text) { 
                var callBackFn = function (arg) { 
                    if (arg) { 
                        document.getElementById('hdn_Hosp').value = ""; 
                        btn.click(); 
                    } 
                } 
                radconfirm(text, callBackFn); 
            } 

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I think this code could be written so that it doesn't use a hidden element.  My second issue though is that I need to get a translated message to display.  I already have the translations server side so my plan was to put the translated text in a hidden element that could be read and displayed.