function validLogin(loginForm) {
	
	 	if (loginForm.username.value == 'Username'){
		alert("Please enter your username");
		loginForm.username.focus();
		return false;
	}
 
	if (loginForm.username.value == ''){
		alert("Please enter your username");
		loginForm.username.focus();
		return false;
	}
	
	if (loginForm.password.value == 'Password') {
		alert("Please enter your password");
		loginForm.password.focus();
		return false;
	} 
	
	if (loginForm.password.value == '') {
		alert("Please enter your password");
		loginForm.password.focus();
		return false;
	} 
	 

	 
 
	
	
	return true;
	
}

 
 function validTell(tellForm) {
 
	if (tellForm.tell_name.value == ''){
		alert("Please enter your name");
		tellForm.tell_name.focus();
		return false;
	}
	
if (tellForm.tell_company.value == '') {
		alert("Please enter your company");
		tellForm.tell_company.focus();
		return false;
	} 
	 
if (tellForm.tell_email.value == ''){
		alert("Please enter your email");
		tellForm.tell_email.focus();
		return false;
	}
	
 if (!validEmail(tellForm.tell_email.value)) {
		tellForm.tell_email.focus();
		return false;
	}

if (tellForm.tell_number.value == '') {
		alert("Please enter your contact number");
		tellForm.tell_number.focus();
		return false;
	} 
	 
 
	
	
	return true;
	
}

 
 

// checks for valid telephone characters
function validNum(telno) {
	
	var pattern = "0123456789+-)(. ";
	var i = 0;
	
	do {
		var pos = 0;
		for ( var j = 0 ; j < pattern.length ; j++ )
			if ( telno.charAt(i) == pattern.charAt(j) )
				pos = 1;
		i++;
	}
	while ( pos == 1 && i < telno.length )
	
	if ( pos == 0 ) return false;
	
	return true;
}



// check email address pattern
function validEmail(addr) {
	
	var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
	
	if ( !regex.test(addr) ) {
		alert("Invalid email address, please try again");
		return false;
	}
	
	return true;
}

// validation for Send to Friend
function val_send_to_friend(loginForm) {
	if (!validEmail(loginForm.addr.value)) {
		loginForm.addr.value = '';
		loginForm.addr.focus();
		return false;
	}
	return true;
}