Javascript syntax error: TypeError: 'undefined' is not a constructor -

i recieve error when launching javascript below:

if(ispartofindex(new array[25,20], indexclaimtyperow)    ){         //display size           listitem = '<li id="soze" data-theme="c"><h3>size:</h3>' +         '<div data-role="fieldcontain" data-theme="c">' +           '<fieldset data-role="controlgroup" data-type="horizontal" id="recieptvat">' +            '<input type="radio" name="radio-choice-1" id="radio-choice-1" value="1.0" />' +             '<label for="radio-choice-1">1.0</label>' +             '<input type="radio" name="radio-choice-1" id="radio-choice-2" value="1.4"  />' +             '<label for="radio-choice-2">1.4</label>' +             '<input type="radio" name="radio-choice-1" id="radio-choice-3" value="2.0"  />' +             '<label for="radio-choice-3">2.0</label>' +           '</fieldset>' +         '</div>' +       '</li>';        $('#itemfieldslist').append(listitem);        $('#itemfieldslist').listview('refresh');     } 

the error message displayed is:

typeerror: 'undefined' not constructor (evaluating 'new array[25,20]')

here ispartofindex expects array first parameter

function ispartofindex(indexrow, indextype){      for(var = 0; < indexrow.length; i++){         if(indexrow[i] == indextype){             return true;         }     }      return false;  } 

what doing wrong?

thanks

should new array(25, 20) or [25, 20]