<script language="javascript">
function auto_version(){
	var browser = {
	versions: function () {
		var u = navigator.userAgent, app = navigator.appVersion;
		return {//移动终端浏览器版本信息
			trident: u.indexOf('Trident') > -1, //IE内核
			presto: u.indexOf('Presto') > -1, //opera内核
			webKit: u.indexOf('AppleWebKit') > -1, //谷歌内核
			gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核
			mobile: !!u.match(/AppleWebKit.*Mobile.*/) || !!u.match(/AppleWebKit/), //是否为移动终端
			ios: !!u.match(/i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
			android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器
			iPhone: u.indexOf('iPhone') > -1 || (u.indexOf('Mac') > -1 && u.indexOf('Macintosh') < 0), //是否为iPhone或者QQHD浏览器
			iPad: u.indexOf('iPad') > -1, //是否iPad
			webApp: u.indexOf('Safari') == -1 //是否web应该程序，没有头部与底部
		};
	    } (),
	    language: (navigator.browserLanguage || navigator.language).toLowerCase()
	}
	var to_url='m/index.asp';
	if (!browser.versions.iPad) {
		if(browser.versions.android || browser.versions.iPhone) {
			document.location = to_url;
		}
	}
 	if(browser.versions.mobile || browser.versions.ios || browser.versions.android || browser.versions.iPhone || browser.versions.iPad ){
		if(screen.width<800 || screen.height<600){
			document.location = to_url;
		}
	}else{
		if(screen.width<=320 || screen.height<=480){
			document.location = to_url;
		}
	}
	
}
auto_version();
</script>
