Date constructor returns NaN in IE, but works in Firefox and Chrome

From a mysql datetime/timestamp format:

var dateStr="2011-08-03 09:15:11"; //returned from mysql timestamp/datetime field
var a=dateStr.split(" ");
var d=a[0].split("-");
var t=a[1].split(":");
var date = new Date(d[0],(d[1]-1),d[2],t[0],t[1],t[2]);

I hope is useful for someone.
Works in IE FF Chrome