function validate_mail(str) {
	   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0 && (str.length) > 8);
	}

	function check_form(frmObj){
		if (frmObj.name.value == ""){
			alert("Please enter your name...");
			frmObj.name.focus();
			return false;
		} else if (!validate_mail(frmObj.email.value)){
			alert("Please enter your e-mail address...");
			frmObj.email.focus();
			return false;
		} else if (frmObj.phone.value == ""){
			alert("Please enter your phone number...");
			frmObj.phone.focus();
			return false;
		} else {
			return true;
		}		
	}
	
	function check_form_static(frmObj){
		if (frmObj.name.value == ""){
			alert("Please enter your name...");
			frmObj.name.focus();
			return false;
		} else if (frmObj.phone.value == ""){
			alert("Please enter your phone number...");
			frmObj.phone.focus();
			return false;
		} else if (!validate_mail(frmObj.email.value)){
			alert("Please enter your e-mail address...");
			frmObj.email.focus();
			return false;
		} else if (frmObj.comments.value == ""){
			alert("Please enter your message...");
			frmObj.comments.focus();
			return false;
		} else {
			return true;
		}		
	}
	
	function check_contact(frmObj){
		if (frmObj.first_name.value == ""){
			alert("Please enter your first name...");
			frmObj.first_name.focus();
			return false;
		} else if (frmObj.last_name.value == ""){
			alert("Please enter your last name...");
			frmObj.last_name.focus();
			return false;
		} else if (frmObj.phone.value == ""){
			alert("Please enter your phone number...");
			frmObj.phone.focus();
			return false;
		} else if (!validate_mail(frmObj.email.value)){
			alert("Please enter your e-mail address...");
			frmObj.email.focus();
			return false;
		} else if (frmObj.comments.value == ""){
			alert("Please enter the message...");
			frmObj.comments.focus();
			return false;
		} else {
			return true;
		}		
	}
	
	function check_callback(frmObj){
		if (frmObj.name.value == ""){
			alert("Please enter your name...");
			frmObj.name.focus();
			return false;
		} else if (frmObj.phone.value == ""){
			alert("Please enter your telephone number...");
			frmObj.phone.focus();
			return false;
		} else {
			return true;
		}		
	}