input 响应回车事件

转自： http://blog.163.com/ppy2790@126/blog/static/1032422412012111194219568/

$(document).ready(function()
{
   $(document).keypress(function(e){
   var curKey = e.which;
   if(curKey == 13)
   {
       pushButton();
   }
   });
});