function validateForm()
{
	var hbgForm = document.forms['hbgform'];
	var formSubmit = true;
	var alerttext = '';
		
	if(IsEmpty(hbgForm.first_name.value)) {
		formSubmit = false;
		alerttext = 'First Name ';
	}

	if(IsEmpty(hbgForm.last_name.value)) {
		formSubmit = false;
		alerttext += 'Last Name ';
	}

	if(IsEmpty(hbgForm.email.value)) {
		formSubmit = false;
		alerttext += 'Email Address ';
	}
	
	if(IsEmail(hbgForm.email.value) == false) {
		formSubmit = false;	
	}
		
	if (formSubmit == false)
	{
		alerttext += " Required";
		alert(alerttext);
		return false;
	}
	
	
}


function IsEmpty(str) {
	if (str == "") {
		return true;
    }
    else { 
   		return false; 
	}
}   

function IsEmail(str) 
{
	if ((str.indexOf(".") > 2) && (str.indexOf("@") > 0))
	{
		 IsNumber = true;
	}
	else
	{
		 IsNumber = false;
		 alert("Please enter a valid Email Address");
	}
 	return IsNumber;
}