function agent(url){
document.write('<iframe src="http://www.sonymusic.co.jp' + url + '" name="frame" id="frame" width="760" height="350" frameborder="0" scrolling="auto"></iframe>');
}

function bg(page) {
	document.getElementById('contents').style.background = 'url(../img/bg/'+ page +'.jpg) #000000 no-repeat -37px -36px';
}