Javascript array problem...

In PC platform, there is no problems (no errors)
but, when I change into android platform,
Type ‘Object’ does not support slicing.
Above error is being called on almost every Array.
So. I change the form ‘var arr = new Array();’ into ‘var arr = [[[“a”,0],[“a”,0],[“a”,0],[“a”,0],[“a”,0],[“a”,0]] …];’ but, still
'Operator ‘<’ cannot be used with a left hand side of type ‘int’ and a right hand side of type ‘Object’.'errors in codes like ‘if(arr_[j][1] < 5) {…’._
How can I solve this problem?? and Why this problem happens not in PC but in android.
Please Help~~

The javascript Array class contains objects, not int or anything else.

What you want to use are .NET inbuilt arrays ie var arr : int = new int[10]; for example