js スマホ版切替ボタンの表示

swich-viewmode.js

var query = location.search;
var cookieStr = document.cookie;
var code = '<div><a href="sp/?viewmode=sp">スマートフォン版に切り替え</a></div>';

if (query.indexOf("viewmode=pc")!=-1){
	document.write(code);
} else if (cookieStr.indexOf("viewmode=pc")!=-1){
	document.write(code);
} else if ((navigator.userAgent.indexOf('iPhone') > 0
	&& navigator.userAgent.indexOf('iPad') == -1)
	|| navigator.userAgent.indexOf('iPod') > 0
	|| navigator.userAgent.indexOf('Android') > 0) {
	document.write(code);
}