按钮图片1:<input type="image" class="peidui_Bt1" src="img/pedui_bt.png" />
按钮图片2:<input class="" type="submit" value="登录" name="" id="m_denglu">
#m_denglu{ width:98px; height:60px; background:url(img/m_denglu.jpg) 0 0 no-repeat; font-size:16px; font-weight:bold;}/*作为背景图片插入*/