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在網(wǎng)站開發(fā)的過程中，有時候為了做適應所有的終端設備，讓圖片根據(jù)終端的大小而改變。我們可以使用JS來實現(xiàn)。

 
          <!--產(chǎn)品列表-->
      <section class="yd_wap_news3 w_wap_news2">
        <h2>
          <i>
          </i>
          <em>
            <a href="/qiudong/" title="產(chǎn)品展示">更多</a></em>產(chǎn)品展示</h2>
        <ul>
        
          <li>
            <a href="/jack/52.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/51.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/50.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/49.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/48.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/47.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/46.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/45.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" >
              <span>測試產(chǎn)品</span></a>
          </li>
        
         
        </ul>
     
          <!--產(chǎn)品列表-->

比如說這樣一組產(chǎn)品列表。

我們給他加這么一段JS，大概意思就是：通過獲取yd_wap_news的寬度，然后設置width等于它的0.485，差不多是一半的值，讓高度值也等于這個值。然后并將這個值賦給了yl_auto這個類，也就是給了圖片。

   <script>
         var all_pm = $(".yd_wap_news3").width();
          width = all_pm * 0.485;
          height = width / 1;
          w = width.toString();
          w = w + "px";
          h = height.toString();
          h = h + "px";
          $(".yl_auto").css("width", w);
          $(".yl_auto").css("height", h);
          </script>
      </section>

醉后我們可以得到：

  
      <!--產(chǎn)品列表-->
      <section class="yd_wap_news3 w_wap_news2">
        <h2>
          <i>
          </i>
          <em>
            <a href="/qiudong/" title="產(chǎn)品展示">更多</a></em>產(chǎn)品展示</h2>
        <ul>
        
          <li>
            <a href="/jack/52.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/51.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/50.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/49.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/48.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/47.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/46.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
          <li>
            <a href="/jack/45.html" target="_self">
              <img src="/style/img/5ccfe345549f7.jpg" alt="" class="yl_auto" style="width: 254.14px; height: 254.14px;">
              <span>測試產(chǎn)品</span></a>
          </li>
        
         
        </ul>
        
      </section>
          <!--產(chǎn)品列表-->

看到變化了嗎？強加了STYLE將給了寬度和高度。