How to do this

@mrhooOct 21.2008 — #The best solution is to give your users a calendar or datepicker control that only allows them to select valid dates.

But if you insist on text input, here are a couple tips-

'2/29/2008' is a 'real' date, and '2/29/2009' is not, but you don't know that until the last digit.

You can use Date.parse or split the string into its parts to create a date from the input.

Remember that parsing '2/29/2009' [B]does [/B]make a valid date. (March 1rst).

An input of'60/60/2000' may be converted to'Jan 29 2005'.

Compare all the parts of the resulting Date with the original input.

But it is a much better tactic to let the users pick from valid choices than to have to teach them how you prefer to format a date string.

These two methods return a new Date object or false from their argument.

Use dmy for dd/mm/yyyy, and mdy for mm/dd/yyyy

[CODE]Validate={
 dmy: function(str, monthfirst){
 var A= str.split(/D+/);
 try{
 A= monthfirst? [A[2]*1, A[0]-1, A[1]*1]: [A[2]*1, A[1]-1, A[0]*1];
 var D= new Date(A[0], A[1], A[2]);
 if(D.getFullYear() == A[0] && D.getMonth()== A[1] && D.getDate()== A[2]){
 return  D;
 }
 }
 catch(er){
 }
 return  false;
 },
 mdy: function(str){
 return  Validate.dmy(str, true);
 }
 }[/CODE]

//test

alert(Validate.dmy('29/2/2009'));

alert(Validate.mdy('2/29/2009'));

alert(Validate.dmy('29/2/2008'));

alert(Validate.mdy('2/29/2008'));

How to do this

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