PROTO Matrix_Gate [
		   eventIn SFBool activate
		   eventOut SFString isActive
		   field SFString target ""
		  ]
{
   Script {
      eventIn SFBool activateSc IS activate
      eventOut SFString isActiveSc IS isActive
      field SFString targetSc IS target

      directOutput TRUE
      mustEvaluate TRUE

      url "javascript:
      function activateSc(value) {
        if( value == true ) {
          isActiveSc = targetSc;
        }
      }
    "
   }
}