returnToMobile.js

!function(a){var b=!1;if("function"==typeof define&&define.amd&&(define(a),b=!0),"object"==typeof exports&&(module.exports=a(),b=!0),!b){var c=window.Cookies,d=window.Cookies=a();d.noConflict=function(){return window.Cookies=c,d}}}(function(){function a(){for(var a=0,b={};a<arguments.length;a++){var c=arguments[a];for(var d in c)b[d]=c[d]}return b}function b(c){function d(b,e,f){var g;if("undefined"!=typeof document){if(arguments.length>1){if(f=a({path:"/"},d.defaults,f),"number"==typeof f.expires){var h=new Date;h.setMilliseconds(h.getMilliseconds()+864e5*f.expires),f.expires=h}try{g=JSON.stringify(e),/^[\{\[]/.test(g)&&(e=g)}catch(a){}return e=c.write?c.write(e,b):encodeURIComponent(String(e)).replace(/%(23|24|26|2B|3A|3C|3E|3D|2F|3F|40|5B|5D|5E|60|7B|7D|7C)/g,decodeURIComponent),b=encodeURIComponent(String(b)),b=b.replace(/%(23|24|26|2B|5E|60|7C)/g,decodeURIComponent),b=b.replace(/[\(\)]/g,escape),document.cookie=[b,"=",e,f.expires?"; expires="+f.expires.toUTCString():"",f.path?"; path="+f.path:"",f.domain?"; domain="+f.domain:"",f.secure?"; secure":""].join("")}b||(g={});for(var i=document.cookie?document.cookie.split("; "):[],j=/(%[0-9A-Z]{2})+/g,k=0;k<i.length;k++){var l=i[k].split("="),m=l.slice(1).join("=");'"'===m.charAt(0)&&(m=m.slice(1,-1));try{var n=l[0].replace(j,decodeURIComponent);if(m=c.read?c.read(m,n):c(m,n)||m.replace(j,decodeURIComponent),this.json)try{m=JSON.parse(m)}catch(a){}if(b===n){g=m;break}b||(g[n]=m)}catch(a){}}return g}}return d.set=d,d.get=function(a){return d.call(d,a)},d.getJSON=function(){return d.apply({json:!0},[].slice.call(arguments))},d.defaults={},d.remove=function(b,c){d(b,"",a(c,{expires:-1}))},d.withConverter=b,d}return b(function(){})});
(function(a){(jQuery.browser=jQuery.browser||{}).mobile=/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))})(navigator.userAgent||navigator.vendor||window.opera);
jQuery(document).ready(function($){
    if(Cookies.get('YSBSITE') !== undefined && jQuery.browser.mobile){
        var cookieDomains = ['.www.domain.com', '.domain.com'];
        $('body').prepend('<a href="javascript:void(0);" class="top returnToMobile">Return to Mobile Site</a>');
        $('body').append('<a href="javascript:void(0);" class="bottom returnToMobile">Return to Mobile Site</a>');
        $('a.returnToMobile').css({
            'font-size':'200%',
            'padding':'20px 0',
            'display':'inline-block',
            'text-decoration':'none',
            'color':'#b3504a'
        });
        $('.returnToMobile').click(function(){
            $.each(cookieDomains, function(i, eachdomain){
                Cookies.remove('YSBSITE',{ domain: eachdomain});
            });
            location.href = location.href.replace(/&?viewfullsite=([^&]$|[^&]*)/i, "");
        });
    }
});

Dependencies (js-cookie and browser.mobile start the script off):
jQuery
https://github.com/js-cookie/js-cookie
jQuery.browser.mobile (http://detectmobilebrowser.com/)

When on www Y! sets cookie domain to .www.domain.com hence the array to make sure we delete the cookie whether you are on www or not.