arguments of operator must have same type error

HI Experts,

I am Getting Below Error

String and int Passed .Arguments of Operator "<" must have same type

Below is the Blogs i have searched but no luck

http://scn.sap.com/thread/

Here is the script i have wriiten in ON STARTUP

var a = TEXT_2.getText();

if (a<100)

{

  PANEL_1.setCSSClass("red");

  }

  else

  {

  PANEL_1.setCSSClass("green");

  }

I am capturing measure value  from text box by creating local variable a  and based on condition i am applying CSS CLASS

where i am missing ?

could any one point me in right direction.

Thanks,.

Varun