//************************  function to verify e-mail start       ************************************

function verifyEmail(emailad) 
{
	var exclude=/[^@\-\.\w]|^[_@\.\-]|[\._\-]{2}|[@\.]{2}|(@)[^@]*\1/;
	var check=/@[\w\-]+\./;
	var checkend=/\.[a-zA-Z]{2,3}$/;
	if(((emailad.search(exclude) != -1)||(emailad.search(check)) == -1)||(emailad.search(checkend) == -1))
	{
		return false;
	}
} 

function ltrim(str)
{
	while(""+str.charAt(0)==" ")
	{
		str=str.substring(1,str.length);
	}
	return str;
}
function reverse(str)
{
	var reversedstr = "";
	var strArray;
	strArray = str.split("");
	for(var i = str.length -1 ; i >= 0 ; i--)
	{
		reversedstr += strArray[i];
	}
	return reversedstr;
}
function trim(str)
{
	str = ltrim(str);
	str = reverse(str);
	str = ltrim(str);
	str = reverse(str);
	return str;
} 
 //************************  function to verify e-mail end       ************************************

//***********************     function for numeric value start  *************************************
function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789./";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }
//***********************     function for numeric value end  *************************************
function trim(str, chars) {
    return ltrim(rtrim(str, chars), chars);
}

function ltrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}

function rtrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}

//***************  function for date  validation start ***************
// url ref : http://www.smartwebby.com/DHTML/date_validation.asp
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}
//***************  function for date  validation end ***************

function validate_order_form()
{
	var f=document.orderForm;	
	if(trim(f.event_date.value)=="")
	{
		alert("Event date can not be blank");
		f.event_date.focus();
		return false;	
	}	
	if (isDate(f.event_date.value)==false)
	{
		//alert("Invalid Date of Birth");
		return false
	}	
	if(trim(f.fname.value)=="")
	{
		alert("First name can not be blank");
		f.fname.focus();
		return false;	
	}
	if(trim(f.lname.value)=="")
	{
		alert("Last name can not be blank");
		f.lname.focus();
		return false;	
	}
	if(trim(f.phone.value)=="")
	{
		alert("Phone number can not be blank");
		f.phone.focus();
		return false;	
	}
	if(!IsNumeric(f.phone.value))
	{
		alert("Enter only numeric values!");
		f.phone.select();
		f.phone.focus();
		return false;
	}
	if(f.phone.value.length>15 || f.phone.value.length<8)
	{
		alert("Invalid phone number!");
		f.phone.select(); 
		f.phone.focus();
		return false;
	}
	if(trim(f.address.value)=="")
	{
		alert("Address can not be blank");
		f.address.focus();
		return false;	
	}
	if(trim(f.city.value)=="")
	{
		alert("City can not be blank");
		f.city.focus();
		return false;	
	}
	
	if(f.country.selectedIndex == 0)
	{
		alert("Please select a country.");
		f.country.focus();
		return false;	
	}
	if(f.state.selectedIndex == 0)
	{
		alert("Please select a state.");
		f.state.focus();
		return false;	
	}
	if(trim(f.zip.value)=="")
	{
		alert("Zip can not be blank.");
		f.zip.focus();
		return false;	
	}

	if(trim(f.v_name.value)=="")
	{
		alert("Venue name can not be blank");
		f.v_name.focus();
		return false;	
	}
	if(trim(f.v_address.value)=="")
	{
		alert("Venue address can not be blank");
		f.v_address.focus();
		return false;	
	}
	if(trim(f.v_city.value)=="")
	{
		alert("Venue city can not be blank");
		f.v_city.focus();
		return false;	
	}
	if(trim(f.v_zip.value)=="")
	{
		alert("Venue zip code can not be blank");
		f.v_zip.focus();
		return false;	
	}
	if(trim(f.e_time_from_start.value)=="")
	{
		alert("Event time from start can not be blank");
		f.e_time_from_start.focus();
		return false;	
	}
	if(trim(f.e_time_from_end.value)=="")
	{
		alert("Event time from end can not be blank");
		f.e_time_from_end.focus();
		return false;	
	}
	if(trim(f.e_time_to_start.value)=="")
	{
		alert("Event time to start can not be blank");
		f.e_time_to_start.focus();
		return false;	
	}
	if(trim(f.e_time_to_end.value)=="")
	{
		alert("Event time to end can not be blank");
		f.e_time_from_start.focus();
		return false;	
	}
}