var current_swap_image = 1;
var max_swap_image =1;

function swap_school_images(num_images)
{

	if (num_images > 1)
	{
		max_swap_image = num_images;
		current_swap_image = num_images;
		popup_interval = setInterval("swap_school_image()",4000);
	}

}

function swap_school_image()
{
	/*alert(current_swap_image);*/

	to_hide = document.getElementById('sch_img_' + current_swap_image);
	to_hide.className = 'hidden'
	
	current_swap_image ++;
	
	if (current_swap_image > max_swap_image)
	{
		current_swap_image = 1;
	}

	to_show = document.getElementById('sch_img_' + current_swap_image);
	to_show.className = 'shown'
	
}