function changeImg_services() {
 if(document.getElementById('content_right').setAttribute('background','images/content_bg_right_2.jpg') && document.getElementById('footer_bg').setAttribute('background','images/footer_bg_2.jpg')) {
	document.getElementById('footer_bg').setAttribute('background','images/footer_bg.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right.jpg');
 } else {
 	document.getElementById('footer_bg').setAttribute('background','images/footer_bg_2.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right_2.jpg');
 }
}

function changeImg_faq() {
 if(document.getElementById('content_right').setAttribute('background','images/content_bg_right_3.jpg')) {
	document.getElementById('footer_bg').setAttribute('background','images/footer_bg.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right.jpg');
 } else {
	document.getElementById('footer_bg').setAttribute('background','images/footer_bg.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right_3.jpg');
 }
}

function changeImg_contact() {
 if(document.getElementById('content_right').setAttribute('background','images/content_bg_right_4.jpg')) {
	document.getElementById('footer_bg').setAttribute('background','images/footer_bg.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right.jpg');
 } else {
	document.getElementById('footer_bg').setAttribute('background','images/footer_bg.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right_4.jpg');
 }
}

function defaultImg() {
	document.getElementById('footer_bg').setAttribute('background','images/footer_bg.jpg');
	document.getElementById('content_right').setAttribute('background','images/content_bg_right.jpg');
}