function ShowHide(Control)
{
  if(Control)
	{
	document.getElementById("IsReturnPrices").style.display="";
	}else{
	document.getElementById("IsReturnPrices").style.display="none";
	}
}

function checkdate(objName) {
	var datefield = objName;
	var dateValue=objName.value;
	if(dateValue.length<10){
		alert("That date is invalid.  Please try again.");
		datefield.focus();
		return false;
	}
	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 = ""; 
	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] = "01";
	strMonthArray[1] = "02";
	strMonthArray[2] = "03";
	strMonthArray[3] = "04";
	strMonthArray[4] = "05";
	strMonthArray[5] = "06";
	strMonthArray[6] = "07";
	strMonthArray[7] = "08";
	strMonthArray[8] = "09";
	strMonthArray[9] = "10";
	strMonthArray[10] = "11";
	strMonthArray[11] = "12";
	strDate = datefield.value;
	if (strDate.length < 1) {
	return true;
	}
	for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
	if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
	strDateArray = strDate.split(strSeparatorArray[intElementNr]);
	if (strDateArray.length != 3) {
	err = 1;
	return false;
	}
	else {
	strDay = strDateArray[2];
	strMonth = strDateArray[1];
	strYear = strDateArray[0];
	if (isNaN(strDay) || isNaN(strMonth) || isNaN(strYear)) {
				return false;
			}
	//alert(strYear);
	}
	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;
	}
	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[i].toUpperCase()) {
	intMonth = i+1;
	strMonth = strMonthArray[i];
	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 < 1)) {
	err = 6;
	return false;
	}
	if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
	err = 7;
	return false;
	}
	if (intMonth == 2) {
	if (intday < 1) {
	err = 8;
	return false;
	}
	if (LeapYear(intYear) == true) {
	if (intday > 29) {
	err = 9;
	return false;
	}
	}
	else {
	if (intday > 28) {
	err = 10;
	return false;
	}
	}
	}
	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(from, to) {
	if (Date.parse(from.value) <= Date.parse(to.value)) {
	alert("The dates are valid.");
	}
	else {
	if (from.value == "" || to.value == "") 
	alert("Both dates must be entered.");
	else 
	alert("To date must occur after the from date.");
	}
}