function _open_chat(form) 
{
	if (form.p_firstname.value == '') 
	{
	    alert('Invalid First Name!');
	    form.p_firstname.focus();
    	
	    return false;
	}

	if (form.p_lastname.value == '') 
	{
	    alert('Invalid Last Name!');
	    form.p_lastname.focus();

	    return false;
	}
	
	var index = form.p_email.value.indexOf('@');
	
	if ((index == -1) ||
		(form.p_email.value.indexOf('@', index + 1) != -1) ||
		(form.p_email.value.charAt(0) == '@') ||
		(form.p_email.value.charAt(form.p_email.value.length - 1) == '@') ||
		(form.p_email.value.indexOf('.') == -1) ||
		(form.p_email.value.charAt(0) == '.') ||
		(form.p_email.value.charAt(form.p_email.value.length - 1) == '.') ||
		(form.p_email.value.indexOf('.', index + 1) == -1)) 
	{
	    alert('Invalid Email Address!');
	    form.p_email.focus();
    	
	    return false;
	}

	return true;
}