/* Feature box */
var current_hpf = '1';
function switch_hpf(element_id)
{
	for (i = 1; i <= 6; i++)
	{
		obj_subject = document.getElementById('hpf_' + i);
		if (i != element_id)
		{
			obj_subject.className = 'hpf_subject';
		}
		else
		{
			obj_subject.className = 'hpf_subject_s';
		}
		
		document.getElementById('hpf_' + i + '_content').style.display = 'none';
		document.getElementById('hp_mid4_id' + i).src = 'http://img.rankranger.com/web/home_design/hp_mid4_id'+i+'_off.jpg';
	}
	
	document.getElementById('hpf_' + element_id + '_content').style.display = '';
	document.getElementById('hp_mid4_id' + element_id).src = 'http://img.rankranger.com/web/home_design/hp_mid4_id'+element_id+'_on.jpg';
	current_hpf = element_id;
}
switch_hpf('1');

function swap_hp_mid_img(element_id, img_ext)
{
	if (current_hpf != element_id)
	{
		document.getElementById('hp_mid4_id' + element_id).src = 'http://img.rankranger.com/web/home_design/hp_mid4_id'+element_id+'_'+img_ext+'.jpg';
	}
}