.mask{background-color:rgba(0,0,0,0.2); width:100%; height:100%;position:fixed;top:0;left:0;z-index:1}
  .prompt_box{width:400px;height:110px;background:#ffffff;border-radius:6px;
   position:fixed;top:50%; left:50%; margin-left:-200px;overflow: hidden;}
  .prompt_box .prompt_title{height:40px;line-height:40px;padding-left:20px;border-bottom:2px solid #1a9ebf;background:#e6e6e6;position: relative;}
  .prompt_box .prompt_title h3{font-size:16px;color: #333333; margin-top:0;}
  .prompt_box .prompt_cancel{width:24px;height:24px;z-index:1;background: url("images/cancel.png") no-repeat;position: absolute;right:0;top:0;cursor:pointer;}
 
  .prompt_box .prompt_cont{position: relative;height:120px;}
  .prompt_box .prompt_cont .prompt_text{line-height:75px;float:left;margin-left:20px;}
  .prompt_box .prompt_cont .prompt_sure{position: absolute;right:20px;bottom:34px;
   width:50px;height: 26px;background:#1a9ebf;border-radius:5px;color:#ffffff;
   font-size: 14px;line-height:26px;text-align: center;cursor:pointer;}
 
  .hide{display:none;}
  .show{display:block;}