function verify_form()
{
	
	var f1 = document.getElementById('firstname').value;	
	var f2 = document.getElementById('lastname').value;	
	var f3 = document.getElementById('email').value;	
	var f4 = document.getElementById('company').value;	
	
	var error1 = "";
		
	if (f1 == "" || f2 == "" || f3 == "" || f4 == ""){
		error1 = " Please fill all the fields marked *!";
		
	}
	
	if (f3!=""){
		var email = checkMail(f3);
		if (email==1){
			error1 = error1 + " Incorrect e-mail address.";
		}
	}

	
	if (error1 != ""){
		document.getElementById('error').innerHTML = "<img src=\"images/error.gif\" width=\"10\" height=\"10\" />" + error1;
		return false;
	}
	else {
		document.getElementById('error').innerHTML = "Please wait...";
		return true;
	}
}

function isNumberKey(evt)
{
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57))
	return false;

	return true;

}

function checkMail(email)
{
	var x = email;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)) return 0;
	else return 1;
}