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var twooff = new Image(); twooff.src = 'images/apt_btn_2_over.gif';
var threeon = new Image(); threeon.src = 'images/apart032.gif';
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var fouron = new Image(); fouron.src = 'images/apart042.gif';
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var sixon = new Image(); sixon.src = 'images/apart062.gif';
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var sevenon = new Image(); sevenon.src = 'images/index_061.jpg';
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var heighton = new Image(); heighton.src = 'images/index_071.jpg';
var heightoff = new Image(); heightoff.src = 'images/index_07.jpg';
var nineon = new Image(); nineon.src = 'images/index_081.jpg';
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var tenon = new Image(); tenon.src = 'images/index_091.jpg';
var tenoff = new Image(); tenoff.src = 'images/index_09.jpg';
var elevenon = new Image(); elevenon.src = 'images/index_101.jpg';
var elevenoff = new Image(); elevenoff.src = 'images/index_10.jpg';
var twelveon = new Image(); twelveon.src = 'images121/apt_btn_2_over.gif';
var twelveoff = new Image(); twelveoff.src = 'images121/apt_btn_2.gif';
var thirteenon = new Image(); thirteenon.src = 'images121/apt_btn_3_over.gif';
var thirteenoff = new Image(); thirteenoff.src = 'images121/apt_btn_3.gif';
var fourteenon = new Image(); fourteenon.src = 'images121/apt_btn_4_over.gif';
var fourteenoff = new Image(); fourteenoff.src = 'images121/apt_btn_4.gif';
var fiftteenon = new Image(); fiftteenon.src = 'images121/apt_btn_5_over.gif';
var fiftteenoff = new Image(); fiftteenoff.src = 'images121/apt_btn_5.gif';
var sixteenon = new Image(); sixteenon.src = 'images121/apt_btn_6_over.gif';
var sixteenoff = new Image(); sixteenoff.src = 'images121/apt_btn_6.gif';