Safari JS cannot parse YYYY-MM-DD date format?

Question

In a project I am working on, I need to validate a date entered into an

With Safari 4/5 (on Mac OSX) the Javascript fails to

Answer 1

You can get an unambiguous date from input, but you still need to check it, so a user doesn't give you April 31.

 
 
 January 
 February 
 March 
 April 
 May 
 June 
 July 
 August 
 September 
 October 
 November 
 December 
 
 Date:   
 Year:   
 

shortcut for document.getElementsByName

function byName(s, n){ n= n || 0; return document.getElementsByName(s)[n]; }

function getDateInput(){
    var day, y= parseInt(byName('inputyear').value),
    m= byName('monthselect').selectedIndex,
    d= parseInt(byName('inputdate').value);

    if(!y || y<1000 || y> 3000) throw 'Bad Year '+y;
    if((!d || d<1 || d> 32) throw 'Bad Date '+d;
    day= new Date(y,m,d);
    if(day.getDate()!= d) throw 'Bad Date '+d;
    value= day.format_mysql();
}

you can preset the fields to reflect the current date onload

onload= function(){
    var now= new Date();
    byName('inputyear').value= now.getFullYear();
    byName('monthselect').selectedIndex= now.getMonth();
    byName('inputdate').value= now.getDate();
}