jquery - How can access the control that we have it's id -

I have a hidden input in my web page in which it has another input control ID, now how to the specific input controls Can I access this code to cache JQuery in my hidden input value?

  & lt; Input type = "hidden" id = "edBuyMeal" runat = "server" value = "btnid" enabled viewstate = "wrong" />   
 
  function setbuyert (s) {debugger wher etter = es. s. Lit ('^'); Var btn = "'#'" + $ ("#" + $ ("# edBuyMeal"). Val ()); $ (Btn) .css ("color", "red"); }   
 I am starting in junkery.   
 
 
 .NET and standard JavaScript in ASP will give you hidden fields like this:  
  var btn = document.getElementById ("& lt;%: edBuyMeal.ClientID%>");   
 Your code is unclear, but it appears that you are getting a value from the hidden field, the value is the ID of a button, then setting the CSS class of that button.  
 It will look like this:  
  var hidden = document.getElementById ("& lt;%: edBuyMeal.ClientID%>"); Var btnId = hidden.val ();   
 ASP.NET Anything with the  Elements ID varies   runat = "server"  will require you to ensure that  ClientIDMode = "static"  is < Code> BtnId . This will allow you to like it:  
  $ (btnId) .addClass ("myRedClass");   
 While JavaScript will be fast, if you want to do it in JQuery, it will look like this:  
  var hidden = $ ("# & lt ;%: EdBuyMeal.ClientID%> & quot;);