//phone validation.
function phonevalid(Obj)
{	
   var num=/^[0-9 ]+$/g;	
   objvalue=eval(Obj).value	;
   if(!(num.test(objvalue)))
   	     return true; 
   else 
   return false;
}

//number validation
function isnumber(Obj)
{
   var num=/^[0-9]+$/g;	
   objvalue=eval(Obj).value	;
   if((!(num.test(objvalue))) || (objvalue<=0))
   	     return true; 
   else 
   return false;
}

//Trim function
function Trim(Obj)
{	
	objvalue=eval(Obj).value
	while (objvalue.substring(0,1)==' ') 
	{
	objvalue=objvalue.substring(1,objvalue.length);
	}
	Obj.value=objvalue;
	if (objvalue.length==0)
			
			return true;
	else
			return false;	
}
//email
function emailvalid(Obj)
{
	
		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(Obj)))
		{
		  return true;	
		   
		}
		else
		{
		   
		   return false;
		}
}

//email validation
function email(Obj)
{
		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(eval(Obj).value)))
		{
		  return true;	
		   
		}
		else
		{
		   
		   return false;
		}
}

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 < 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[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[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;
			}
		}
	}
	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(from, to)
 {
	if (Date.parse(from.value) <= Date.parse(to.value))
	{
		//alert("The dates are valid.");
		return true;
	}
	else 
	{
		if (from.value == "" || to.value == "") 
			//alert("Both dates must be entered.");
			return false;
		else 
			//alert("To date must occur after the from date.");
			return false;
	}
}
function isDate(dateStr) 
{
	
	var datePat = /^(\d{1,2})\/(\/|)(\d{1,2})\/(\/|)(\d{4})$/;
	var matchArray = dateStr.match(datePat); // is format OK?
	//alert(matchArray);
	if (matchArray == null) {
	  return false;
	}
	

	// parse date into variables
	day = matchArray[3];
	month = matchArray[1];		
	year = matchArray[5];

		
	if (day < 1 || day > 31) {
	  alert("Day must be between 1 and 31.");
	  return false;
	}
		
	if (month < 1 || month > 12) { // check month range
	  alert("Month must be between 1 and 12.");
	  return false;
	}

	if ((month==4 || month==6 || month==9 || month==11) && day==31) {
	  alert("Month " + month + " doesn't have 31 days!")
	  return false;
	}

	if (month == 2) { // check for february 29th
	  var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
	  if (day > 29 || (day==29 && !isleap)) {
	    alert("February " + year + " doesn't have " + day + " days!");
	    return false;
	  }
	}
	return true;  // date is valid
}
function datediff(frmdateStr,todateStr)
{
	
	datDate1= Date.parse(frmdateStr); 
	datDate2= Date.parse(todateStr); 
	dateDiff = ((datDate2-datDate1)/(24*60*60*1000)) ;
	return dateDiff;
}