var x1, x2, x3=0;
var start, end, t1, t2;

 start = new Date();
 for (x1=1; x1<=10000; x1++)
   for(x2=1; x2<=10000; x2++) 
    x3 += Math.sqrt(x1*x2) ; 
 end = new Date();

t1=start.getTime();
t2=end.getTime();
WScript.Echo("Time for loop: " + (t2-t1)) ;