//var rasterPI = new Array();

var rasterPI = MultiDimensionalArray(5,3); 
 
function MultiDimensionalArray(iRows,iCols) 
{ 
   var i; 
   var j; 
   
   var a = new Array(iRows); 
   for (i=0; i < iRows; i++) 
   { 
       a[i] = new Array(iCols); 
       for (j=0; j < iCols; j++) 
       { 
           a[i][j] = null; 
       } 
   } 
   
   return(a); 
}