Correct way to search for character within a string

I am trying to search for the occurrence of a "(" within a text string - unfortunately my code is reported as incorrect.

I extract the text correctly but cannot create the search statement correctly:

var mylistpgftext = pgf.GetText (Constants.FTI_String)   

for (var i=0; i < mylistpgftext.length; i++)             

{                                                        

    var mylistitem = mylistpgftext.sdata              

    var mybracketpos = mylistitem.search(/(/i)    --------------error line-----------------       

    if (mybracketpos != -1)                              

    {                                                    

      alert(mylistitem)                                  

    }                                                    

}