Ask: Date selection box, how selenium locates page elements_html/css_WEB-ITnose

<div class="inputRow"><span>购车日期</span><input id="buyDate" type="hidden" name="buyDate" value="2013-12"><span id="year__jQSelect0" class="dropdown" tabindex="0" style="width: 72px; height: 31px; z-index: auto; position: relative;"><select id="year" class="select_yy select_zdy2" onchange="changeBuyDate(this)" style="display: none;"><option value="2004">2004</option><option value="2005">2005</option><option value="2006">2006</option><option value="2007">2007</option><option value="2008">2008</option><option value="2009">2009</option><option value="2010">2010</option><option value="2011">2011</option><option value="2012">2012</option><option value="2013">2013</option><option value="2014" selected="true">2014</option></select><span class="dropselectbox select_zdy2" style="z-index: 101;"><h4 class="" style="width: 44px; padding-right: 24px;">2013</h4><ul style="width: 63px; display: none; top: 31px;"></ul></span></span><lable style="font-weight:normal;color:white;">年</lable><span id="month__jQSelect1" class="dropdown" tabindex="0" style="width: 72px; height: 31px; z-index: 99;"><select id="month" class="select_mm select_zdy2" onchange="changeBuyDate(this)" style="display: none;"><option value="01"> 01 </option><option value="02"> 02 </option><option value="03"> 03 </option><option value="04"> 04 </option><option value="05"> 05 </option><option value="06"> 06 </option><option value="07"> 07 </option><option value="08"> 08 </option><option value="09"> 09 </option><option value="10"> 10 </option><option value="11"> 11 </option><option value="12"> 12 </option></select><span class="dropselectbox select_zdy2" style="z-index: 101;"><h4 class="" style="width: 44px; padding-right: 24px;"> 12 </h4><ul style="width: 63px; display: none;"></ul></span></span><lable style="font-weight:normal;color:white;">月</lable></div>