function checkValidity()
{		
	
	document.getElementById('lblFullNames').innerHTML = "";
	document.getElementById('lblEmails').innerHTML = "";
	document.getElementById('lblExp').innerHTML = "";
	
	if( (document.getElementById('txtFullName').value == ""))
	{
		document.getElementById('lblFullNames').innerHTML = "Please enter your name.";
		return false;
	}
	if( (document.getElementById('txtEmail').value == ""))
	{
		document.getElementById('lblEmails').innerHTML = "Please enter email address.";
		return false;
	}
	
	//********************To validate email address *******************//
				
					if( document.getElementById('txtEmail').value != "")
					{
						var emailID=document.getElementById("txtEmail").value;
							
						if ((emailID==null)||(emailID==""))
						{
							document.getElementById('lblEmails').innerHTML = "Please Enter your Email ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}
						
						var at="@";
						var dot=".";
						var lat=emailID.indexOf(at);
						var lstr=emailID.length;
						var ldot=emailID.indexOf(dot);
						if (emailID.indexOf(at)==-1)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}

						if (emailID.indexOf(at)==-1 || emailID.indexOf(at)==0 || emailID.indexOf(at)==lstr)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}

						if (emailID.indexOf(dot)==-1 || emailID.indexOf(dot)==0 || emailID.indexOf(dot)==lstr)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}

						if (emailID.indexOf(at,(lat+1))!=-1)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}

						if (emailID.substring(lat-1,lat)==dot || emailID.substring(lat+1,lat+2)==dot)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}

						if (emailID.indexOf(dot,(lat+2))==-1)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}
						
						if (emailID.indexOf(" ")!=-1)
						{
							document.getElementById('lblEmails').innerHTML = "Invalid E-mail ID.";
							document.getElementById("txtEmail").focus();
							return false;
						}
						
			       }
	if( (document.getElementById('txtDetails').value == ""))
	{
		document.getElementById('lblExp').innerHTML = "Please enter experience.";
		return false;
	}
	return true;
}