function hide_images() {
	
	var top_left_image = document.getElementById('top_left_image').innerHTML;
	var top_right_image = document.getElementById('top_right_image').innerHTML;
	var bottom_left_image = document.getElementById('bottom_left_image').innerHTML;
	var bottom_right_image = document.getElementById('bottom_right_image').innerHTML;	
	
	if(top_left_image == '' && top_right_image == '') {
		document.getElementById('about_us_top_images').className = 'no_show';
	}
	
	if(bottom_left_image == '' && bottom_right_image == '') {
		document.getElementById('about_us_bottom_images').className = 'no_show';
	}
}