function hideImage (name) {
  var c = document.getElementById(name);
  c.style.left        = -5000+"px";
}



function hideAll () {
hideImage('ABOUT');
hideImage('GTA');
hideImage('IMAGE');
hideImage('CONTACT');
hideImage('TESTIMONIALS');
}



function showImage (name) {
  var c = document.getElementById(name);
  c.style.left        = 0 +"px";
}










function checkForm(){
	var email = document.getElementById('email');
	var request = document.getElementById('request');

	if(!isEmpty(request, "Please fill in all sections of the form.")){
							if(emailValidator(email, "Invalid email address.")){ return true; }
	}
	
	return false;	
}



function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); 
		return true;
	}
	return false;
}

function emailValidator(elem, helperMsg){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.value.match(emailExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}