function checkform ( form )
{



  if (form.email.value == "") {
    alert( "Please enter your Email address." );
    form.email.focus();
    return false ;
  }
  
  if(form.email.value.indexOf('@')==-1)
   {
     alert("Enter correct Email Id");
     form.email.value="";
     form.email.focus();
        return false ;
  }
  
    if(form.email.value.indexOf('.')==-1)
     {
       alert("Enter correct Email Id");
       form.email.value="";
       form.email.focus();
          return false ;
  }
      if(form.email.value.indexOf(',')!=-1)
       {
         alert("Enter correct Email Id");
         form.email.value="";
         form.email.focus();
            return false ;
  }
        if(form.email.value.indexOf(';')!=-1)
         {
           alert("Enter correct Email Id");
           form.email.value="";
           form.email.focus();
              return false ;
  }
  
    if (form.firstname.value == "") {
      alert( "Please enter your First name." );
      form.firstname.focus();
      return false ;
    }
    if (form.lastname.value == "") {
      alert( "Please enter your Last name." );
      form.lastname.focus();
      return false ;
  }

  return true ;
}

// ******************************************************************************
// Display Formated Date
function GetDay(iDay)
{
	var DayArray = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");

	return DayArray[iDay];
}

function GetMonth(iMonth)
{
	var arMonth = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");

	return arMonth[iMonth];
}

function GetYear(year)
{
	if (year < 2000) {
		year = year + 1900;
	}
	return year;
}

function getDateStrWithDOW()
{
	var today = new Date();
	var mon   = GetMonth(today.getMonth());
	var day   = GetDay(today.getDay());
	var year  = GetYear(today.getYear());
	var hours = today.getHours();

	return (day + ", " + mon + " " + today.getDate() + ", " + year);
}

// Expand - Shrink sections
function enable_expand(nr, condition) {
	if (document.getElementById)
	{
		if (document.getElementById(nr)) {
			current = (condition == false) ? 'none' : 'block';
			document.getElementById(nr).style.display = current;
		}
	}
	else if (document.all)
	{
		if (document.all[nr]) {
			current = (condition == false) ? 'none' : 'block'
			document.all[nr].style.display = current;
		}
	}
}

// Expand - Shrink sections
function switch_expand(nr) {
	if (document.getElementById)
	{
		if (document.getElementById(nr)) {
			if (document.getElementById(nr).style.display == 'none') {
				document.getElementById(nr).style.display = 'block';
			} else if (document.getElementById(nr).style.display == 'block') {
				document.getElementById(nr).style.display = 'none';
			}
		}
	}
	else if (document.all)
	{
		if (document.all[nr]) {
			if (document.all[nr].style.display == 'none') {
				document.all[nr].style.display = 'block';
			}
			if (document.all[nr].style.display == 'block') {
				document.all[nr].style.display = 'none';
			}
		}
	}
}

// Form Validation
function validateField(theForm, fieldname, fieldtype, msg) {
	var length, i, checked;
	if (fieldtype == "text") {
		if (theForm.elements[fieldname].value == "") {
			alert(msg);
			theForm.elements[fieldname].focus();
			return false;
		}
	}
	if (fieldtype == "select") {
		if (theForm.elements[fieldname][theForm.elements[fieldname].selectedIndex].value == "" || theForm.elements[fieldname][theForm.elements[fieldname].selectedIndex].value == "-1") {
			alert(msg);
			theForm.elements[fieldname].focus();
			return false;
		}
	}
	if (fieldtype == "radio") {
		checked = false;
		length = theForm.elements[fieldname].length;
		for (i=0;i<length;i++) {
			if (theForm.elements[fieldname][i].checked == true) {
				checked = true;
			}
		}
		if (checked == false) {
			alert(msg);
			theForm.elements[fieldname][0].focus();
			return false;
		}
	}
	if (fieldtype == "checkboxmultiple") {
		checked = false;
		length = theForm.elements[fieldname].length;
		for (i=0;i<length;i++) {
			if (theForm.elements[fieldname][i].checked == true) {
				checked = true;
			}
		}
		if (checked == false) {
			alert(msg);
			theForm.elements[fieldname][0].focus();
			return false;
		}
	}
	return true;
}

// Validate Dates

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){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
	return true;
}

function ValidateForm(){
	var dt=document.frmSample.txtDate
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
	return true
}

function valid_email(inputStr){
	var atPos=inputStr.indexOf("@",0);
	var spacePos=inputStr.indexOf(" ",0);

	if (spacePos>0){
		return false;
	}
	else if (atPos<0){
		return false;
	}
	else{
		var pointPos=inputStr.indexOf(".",atPos);
	 	if (pointPos==-1){
			return false;
		} else if (pointPos==inputStr.length-1){
			return false;
		}
	}
	return true;
}

function IsNumeric(sText) {
	var ValidChars = "0123456789.";
	var IsNumber=true;
	var Char;

	for (i = 0; i < sText.length && IsNumber == true; i++)  { 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1)  {
			IsNumber = false;
		}
	}
	return IsNumber;
}


function show(id) 
{ 
if (document.getElementById(id).style.display == 'none') 
{ 
document.getElementById(id).style.display = ''; 
} 
} 
function hide(id) 
{ 
document.getElementById(id).style.display = 'none'; 
}