str to date

<script>
function   str2date(str){
var   d=null;
var   reg=/^(\d{4})-(\d{2})-(\d{2})   (\d{2}):(\d{2}):(\d{2})\.(\d+)$/
if(arr=str.match(reg))d=new   Date(Number(arr[1]),Number(arr[2])-1,Number(arr[3]),Number(arr[4]),Number(arr[5]),Number(arr[6]),Number(arr[7]))
return   d;
}
function   date2str(d){
var   ret=d.getFullYear()+ "- "
ret+=( "00 "+(d.getMonth()+1)).slice(-2)+ "- "
ret+=( "00 "+d.getDate()).slice(-2)+ "   "
ret+=( "00 "+d.getHours()).slice(-2)+ ": "
ret+=( "00 "+d.getMinutes()).slice(-2)+ ": "
ret+=( "00 "+d.getSeconds()).slice(-2)+ ". "
return   ret+d.getMilliseconds()
}

if(d=str2date( "2002-06-01   12:34:56.789 "))alert(d.toLocaleString())
document.write(date2str(new   Date()))
</script>