/**
 * main image swap
 */

function swapMainImg(name){
	if(name != 'main') document.getElementById('btn_'+name).src = 'image/top_btn_'+name+'_ov.jpg';
	document.getElementById('main_img').src = 'image/top_'+name+'.jpg';
	document.getElementById('main_btn').style.backgroundImage = 'url(image/top_'+name+'_bg.jpg)'
}

function restoreBtnImg(name){
	document.getElementById('btn_'+name).src = 'image/top_btn_'+name+'.jpg';
}