var phoneWidth = parseInt(window.screen.width) var phoneScale = phoneWidth / 640 var ua = navigator.userAgent if (/Android (\d+\.\d+)/.test(ua)) { var version = parseFloat(RegExp.$1) if(version>2.3){ document.write('<meta name="viewport" content="width=640, minimum-scale = '+phoneScale+', maximum-scale = '+phoneScale+', target-densitydpi=device-dpi">') }else{ document.write('<meta name="viewport" content="width=640, target-densitydpi=device-dpi">') } } else { document.write('<meta name="viewport" content="width=640, user-scalable=no, target-densitydpi=device-dpi">') }
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