HTMLで昇順および降順のJavaスクリプトをコーディングするのに問題があります。誰かが私を助けることができますか?ここにコーディングの私のHTML部分があります
<div class="content">
<!-- sorting, pages -->
<div class="list_manage">
<div class="inner clearfix">
<form action="#" method="post" class="form_sort"> <span class="manage_title">Sort by:</span>
<select class="select_styled white_select" name="sort_list" id="sort_list">
<option value="1" data-sort="ladd">Latest Added
<option value="2" selected="" data-sort="price">Price High - Low
<option value="3" data-sort="loc">Location
<!--<option value="4">Names A-Z
<option value="5">Names Z-A-->
</select>
</form>
</div>
</div>
<!--/ sorting, pages -->
<!-- offers list -->
<div class="offer_list clearfix">
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_01.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Mercedes-Benz ML 350 BlueTEC 4MATIC 7G</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, Used vehicle, Automatic transmission, Diesel, 190 kW (258 PS), Fuel consumption combined: 6.8 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$32.690</div> <span class="offer_miliage">55,689 KM</span>
<span class="offer_regist">08/2011</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_02.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Porsche CAYENNE S DIESEL V8 4.2</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, New vehicle, Automatic transmission, Diesel, 281 kW (382 PS), Fuel consumption combined: 14.3 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$56.300</div> <span class="offer_miliage">237,391 KM</span>
<span class="offer_regist">12/2012</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_03.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Infiniti FX 37 AWD Aut. S Premium</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, New vehicle, Automatic transmission, Diesel, 281 kW (382 PS), Fuel consumption combined: 14.3 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$47.000</div> <span class="offer_miliage">27,391 KM</span>
<span class="offer_regist">08/2010</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_04.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Volvo XC60 D5 AWD Aut. RE-Design</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, New vehicle, Automatic transmission, Diesel, 281 kW (382 PS), Fuel consumption combined: 14.3 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$26.750</div> <span class="offer_miliage">50,584 KM</span>
<span class="offer_regist">05/2011</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_05.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">BMW X5 Adaptive Drive Head-Up Display</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, New vehicle, Automatic transmission, Diesel, 281 kW (382 PS), Fuel consumption combined: 14.3 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$33.300</div> <span class="offer_miliage">15,785 KM</span>
<span class="offer_regist">10/2012</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_06.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Land Rover Sport SDV6 HSE</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, New vehicle, Automatic transmission, Diesel, 281 kW (382 PS), Fuel consumption combined: 14.3 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$44.300</div> <span class="offer_miliage">197,391 KM</span>
<span class="offer_regist">07/2009</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_07.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Audi Q7 4.2 TDI S-LINE PANORAMA</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, Used vehicle, Manual transmission, LPG & DIesel, 158 kW (215 PS), Fuel consumption combined: 8.9 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$48.500</div> <span class="offer_miliage">18,085 KM</span>
<span class="offer_regist">03/2011</span>
</div>
</div>
</div>
<div class="offer_item clearfix">
<div class="offer_image"><a href="offers-details.html"><img src="images/temp/prod_img_08.jpg" alt=""></a>
</div>
<div class="offer_aside">
<h2><a href="offers-details.html">Volkswagen Touareg V6 TDI R-Line</a></h2>
<div class="offer_descr">
<p>Off-road Vehicle/Pickup Truck, Used vehicle, Automatic transmission, Diesel, 408 kW (555 PS), Fuel consumption combined: 15.4 l/100 km</p>
</div>
<div class="offer_data">
<div class="offer_price">$63.300</div> <span class="offer_miliage">7,785 KM</span>
<span class="offer_regist">12/2011</span>
</div>
</div>
</div>
</div>
並べ替えて、高値から安値、またはその逆のみを表示したい。