1. Free Delta
  2. Javascript
  3. Comparing Dates

Comparing Dates

A little function in Javascript that compares two dates: if the field date is older than current date, an alert is shown.

The format for the parameter date_field is dd/mm/yyyy. For the dd/mm/yy format a casting is required


 

function IsOldDate(date_field){

var date_array = date_field.split("/");
var df = date_array[0];
var mf = date_array[1];
var yf = date_array[2];

compare_datefield=(parseInt(yf)*10000)+(parseInt(mf,10)*100)+parseInt(df,10);

var currentTime = new Date();
var mt = currentTime.getMonth()+1; //-- javascript begins months in 0
var dt = currentTime.getDate();
var yt = currentTime.getFullYear();

compare_currentdate=(parseInt(yt)*10000)+(parseInt(mt,10)*100)+parseInt(dt,10);
alert(compare_currentdate +" date "+compare_datefield);

if( (compare_currentdate) > (compare_datefield) ){
alert("the date is older than current date!");
return (true);
}else{
return (false);
}
}