function styleSwitch(strID, default_image, open_image)
{
	var boxA = "c_"+strID;
	var boxB = "b_"+strID;

	//jp/img/bg_categoryname_ac.gif
	var default_image = "url('"+default_image+"')";
	var open_image = "url('"+open_image+"')";

	strStatus = document.getElementById(boxA).style.display;

	if(strStatus == 'none')
	{
		document.getElementById(boxA).style.display = '';
		document.getElementById(boxB).style.background = open_image;
	}
	else
	{
		document.getElementById(boxA).style.display = 'none';
		document.getElementById(boxB).style.background = default_image;
	}
}