Another Example Of Date Check

function checkdate(objName) {

var datefield = objName;

if (chkdate(objName) == false) {

datefield.select();

alert("That date is invalid.  Please try again.");

datefield.focus();

return false;

}

else {

return true;

   }

}

function chkdate(objName) {

//var strDatestyle = "US"; //United States date style

var strDatestyle = "EU";  //European date style

var strDate;

var strDateArray;

var strDay;

var strMonth;

var strYear;

var intday;

var intMonth;

var intYear;

var booFound = false;

var datefield = objName;

var strSeparatorArray = new Array("-"," ","/",".");

var intElementNr;

var err = 0;

var strMonthArray = new Array(12);

strMonthArray[0] = "Jan";

strMonthArray[1] = "Feb";

strMonthArray[2] = "Mar";

strMonthArray[3] = "Apr";

strMonthArray[4] = "May";

strMonthArray[5] = "Jun";

strMonthArray[6] = "Jul";

strMonthArray[7] = "Aug";

strMonthArray[8] = "Sep";

strMonthArray[9] = "Oct";

strMonthArray[10] = "Nov";

strMonthArray[11] = "Dec";

strDate = datefield.value;

if (strDate.length <>

return true;

}

for (intElementNr = 0; intElementNr <>

if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {

strDateArray = strDate.split(strSeparatorArray[intElementNr]);

if (strDateArray.length != 3) {

err = 1;

return false;

}

else {

strDay = strDateArray[0];

strMonth = strDateArray[1];

strYear = strDateArray[2];

}

booFound = true;

   }

}

if (booFound == false) {

if (strDate.length>5) {

strDay = strDate.substr(0, 2);

strMonth = strDate.substr(2, 2);

strYear = strDate.substr(4);

   }

}

if (strYear.length == 2) {

strYear = '20' + strYear;

}

// US style

if (strDatestyle == "US") {

strTemp = strDay;

strDay = strMonth;

strMonth = strTemp;

}

intday = parseInt(strDay, 10);

if (isNaN(intday)) {

err = 2;

return false;

}

intMonth = parseInt(strMonth, 10);

if (isNaN(intMonth)) {

for (i = 0;i<12;i++)>

if (strMonth.toUpperCase() == strMonthArray.toUpperCase()) {

intMonth = i+1;

strMonth = strMonthArray;

i = 12;

   }

}

if (isNaN(intMonth)) {

err = 3;

return false;

   }

}

intYear = parseInt(strYear, 10);

if (isNaN(intYear)) {

err = 4;

return false;

}

if (intMonth>12 || intMonth<1)>

err = 5;

return false;

}

if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday <>

err = 6;

return false;

}

if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday <>

err = 7;

return false;

}

if (intMonth == 2) {

if (intday <>

err = 8;

return false;

}

if (LeapYear(intYear) == true) {

if (intday > 29) {

err = 9;

return false;

}

}

else {

if (intday > 28) {

err = 10;

return false;

}

}

}

if (strDatestyle == "US") {

datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;

}

else {

datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;

}

return true;

}

function LeapYear(intYear) {

if (intYear % 100 == 0) {

if (intYear % 400 == 0) { return true; }

}

else {

if ((intYear % 4) == 0) { return true; }

}

return false;

}

function doDateCheck(to) {

//alert(document.form.to.value);

var d=new Date();

var monthname=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");

//Ensure correct for language. English is "January 1, 2004"

var TODAY = d.getDate() + "- " +monthname[d.getMonth()] + "- " + d.getFullYear();

//alert(Date.parse(TODAY));

if (TODAY <= to.value)

{

alert("The date is valid.");

}

else

alert(" date must occur GREATER THAN SYSDATE date.");

  

}