timestamp - Javascript:Add Hours to Date -


I'm new to Java scripting and I'm trying the following code 

  added Can be var r = document.getElementById ("Choose"). Values; // r can be 5 or 2.5 or so. Var dt = new date (); Var time = dt.getHours (); Var time2 = dt.setHours (1); Warning (time 2);   
 But I get some of these kind of values ​​ 1398284822090  Is not there a better way to add hours and change in standard format? For more information, any document will also be useful. Thank you ..   
 
 
  long value  is a timestamp calling  setHours < / Code> Really changes the date to  dt , so that you simply:  
  dt.setHours (1); Warning (dt);

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