Set start day of the week in jQuery UI Datepicker?

Here is an example config I use. Look at the last line with “firstDay: 1”.
I think using sytax like this to specify datepicker options looks better 😉

$('#datepickerfield').datepicker({
    constrainInput: true,   // prevent letters in the input field
    minDate: new Date(),    // prevent selection of date older than today
    showOn: 'button',       // Show a button next to the text-field
    autoSize: true,         // automatically resize the input field 
    altFormat: 'yy-mm-dd',  // Date Format used
    beforeShowDay: $.datepicker.noWeekends,     // Disable selection of weekends
    firstDay: 1 // Start with Monday
})