如何在单击OKY到JavaScript确认后打开引导模式？

我的代码：

 function generatexy(){
       var xyz = document.getElementById('solvednum').value;
      if(confirm('New SIR Number: '+ solvednum +' has been generated. Do you want to save?') == true){
      //After clicking okay on confirm - I want open bootstrap modal here.
         return true;
       }else{
         window.location = "<?php echo base_url(); ?>controller/method";
          return false;
       }
     }