iPhone ,Androidで縦でも横でも同じ横幅にする

AndroidとiPhoneで縦でも横でも横幅320pxにする方法

;(function($){
	var portraitWidth,landscapeWidth;
	if(/Android/.test(window.navigator.userAgent)){
		var changeEvent = "resize";
	}else{
		var changeEvent = "orientationchange";
		$("body").width(320)
	}
	$(window).bind(changeEvent, function(){
		if(Math.abs(window.orientation) === 0){
			portraitWidth=$(window).width();
			if(/Android/.test(window.navigator.userAgent)){
				if(!portraitWidth)portraitWidth=$(window).width();
			}else{
				portraitWidth=$(window).width();
			}
			$("html").css("zoom" , portraitWidth/320 );
		}else{
			$("body").removeClass("portrait").addClass("landscape");
			if(/Android/.test(window.navigator.userAgent)){
				if(!landscapeWidth)landscapeWidth=$(window).width();
			}else{
				landscapeWidth=$(window).width();
			}
			$("html").css("zoom" , landscapeWidth/320 );
		}
	}).trigger(changeEvent);
})(jQuery);