Allow scaling on iPhone when viewport has user-scalable=no

allowscale.js

javascript:(function() { var v = document.querySelector("meta[name=viewport]"); var vc = v.content; if(!!vc.match('user-scalable')) { var as = vc.replace(/user-scalable\s*=\s*no/,'user-scalable=yes'); } else { var as = vc + ',user-scalable=yes'; } if(!!vc.match(/maximum-scale/)) { as = as.replace(/(,?)\s*maximum-scale\s*=\s*(.*)/,'$1maximum-scale=3') } else { as += ',maximum-scale=3'; } v.content = as; })();