How to convert in to Java script array

Hi Experts, How can i convert  for example (1;2;3)  to Java script array [ "1"  , "2"  , "3"  ]; Another example (1,9,12,36,25)  to  ["1" , "9" ,"12" ,"36" , "25" ] Is there a Function module in Java script ? Best regards, pradeep.