/**
 * @author masaya
 */
  
function change_font_size(id, size)
{
	elm = document.getElementById(id);
	elm.style.fontSize = size;
}

function swap_image(elm, path) {
	if(elm.tagName.toUpperCase() == 'IMG')
	{
		elm.src = path;
	}
	else if(elm.childNodes && elm.childNodes[0].tagName.toUpperCase() == 'IMG')
	{
		elm.childNodes[0].src = path;
	}
}

function change_width(id, size)
{
	elm = document.getElementById(id);
	elm.style.width = size;
}

function change_bg_color(id, color)
{
	elm = document.getElementById(id);
	
	document.getElementById('small').style.backgroundColor = '#fff';
	document.getElementById('middle').style.backgroundColor = '#fff';
	document.getElementById('large').style.backgroundColor = '#fff';
	
	elm.style.backgroundColor = color;
}