function check() 
{

	var fname = document.myform.firstname;
	var lname = document.myform.lastname;
	var email = document.myform.email;
	var phn = document.myform.phone;
	var affl = document.myform.affiliation;
	var add1 = document.myform.address1;

	validChars="abcdefghijklmnopqrstuvwxyz";
	validChars+="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

	mess = "Please fill in correct details for \n";

	fLength=fname.value.length;
	lLength=lname.value.length; 

	var flag=0;
	if(fname.value == ""){                                              //First name box validation
				mess += "First Name";
				flag=1;
			}
	else{
 		for(var i=0;i<fLength;i++){
   			if(validChars.indexOf(fname.value.charAt(i))==-1){
				mess += "First Name";
				flag=1;
			}
  		}
	}


	if(lname.value == ""){                                              //Last name box validation
				if(flag==1)
					mess += ", Last name";
				else
					mess += "Last name";
				flag =1;
	}
	else{
 		for(var i=0;i<lLength;i++){
   			if(validChars.indexOf(lname.value.charAt(i))==-1){
										if(flag==1)
											mess += ", Last name";
										else
											mess += "Last name";
			}
  		}
	}


	if ((email.value.indexOf("@") == -1) || (email.value.indexOf(".") == -1)) {             // Email validation
				if(flag==1)
					mess += ", Email";
				else
					mess += "Email";
				flag=1;

	}

	if (! (parseInt(phn.value) > 0)) {                                                   //Phone number validation
				if(flag==1)
					mess += ", Phone number";
				else
					mess += "Phone number";
				flag =1;
 	}
	if(affl.value == "")  {                                                               //Affiliation box validation
				if(flag==1)
					mess += ", Affiliation";
				else
					mess += "Affiliation";
				flag =1;
	 }

	if(add1.value == "") {                                                               //Address box validation
				if(flag==1)
					mess += ", Address";
				else
					mess += "Address";
				flag =1;
	 }
	
	mess += ".";
  
	if(flag==1){
		alert(mess);
		return false;
 	}
	return true;
}