//*********************************************************
// 目的：    代码运行框
// 输入：    obj
// 返回：    
//*********************************************************
function copycode(obj) {
  var rng = document.body.createTextRange();
  var obj1=document.getElementById(obj)
  rng.moveToElementText(obj1);
  rng.scrollIntoView();
  rng.select();
  rng.execCommand("Copy");
  rng.collapse(false);
}

function runCode(obj) {
        var winname = window.open('', "_blank", '');
        var obj1=document.getElementById(obj)
       winname.document.open('text/html', 'replace');
      winname.opener = null // 防止恶意修改
        winname.document.writeln(obj1.value);
        winname.document.close();
}
function saveCode(obj) {
        var winname = window.open('', '_blank', 'top=10000');
        var obj1=document.getElementById(obj)
        winname.document.open('text/html', 'replace');
        winname.document.writeln(obj1.value);
        winname.document.execCommand('saveas','','code.htm');
        winname.close();
}