关于对frame打印的问题

在ie中，如果想打印frame中的内容，用window.print(frameid)好像不行，不过可以调用下面js中的printframe方法实现,即printframe(frameid)~

<script  language=“jscript“>
if ( printisnativesupport() )
  window.print2 = window.print;
  window.print = printframe;

// main stuff
function printframe(frame, onfinish) {
  if ( !frame ) frame = window;

  function execonfinish() {
    switch ( typeof(onfinish) ) {
      case "string": execscript(onfinish); break;
      case "function": onfinish();
    }
    if ( focused && !focused.disabled ) focused.focus();
  }

  if ( frame.document.readystate !== "complete" &&
       !confirm("the document to print is not downloaded yet! continue with printing?") )
  {
    execonfinish();
    return;
  }

  if ( window.print2 ) { // ie5
    var focused = document.activeelement;
    frame.focus();
    if ( frame.print2 ) frame.print2();
    else frame.print();
    execonfinish();
    return;
  }

  var eventscope = printgeteventscope(frame);
  var focused = document.activeelement;

  window.printhelper = function() {
    execscript("on error resume next: printwb.execwb 6, 1", "vbscript");
    printfireevent(frame, eventscope, "onafterprint");
    printwb.outerhtml = "";
    execonfinish();
    window.printhelper = null;
  }

  document.body.insertadjacenthtml("beforeend",
    "<object id=\"printwb\" width=0 height=0 \
    classid=\"clsid:8856f961-340a-11d0-a96b-00c04fd705a2\"></object>");

  printfireevent(frame, eventscope, "onbeforeprint");
  frame.focus();
  window.printhelper = printhelper;
  settimeout("window.printhelper()", 0);
}

// helpers
function printisnativesupport() {
  var agent = window.navigator.useragent;
  var i = agent.indexof("msie ")+5;
  return parseint(agent.substr(i)) >= 5 && agent.indexof("5.0b1") < 0;
}

function printfireevent(frame, obj, name) {
  var handler = obj[name];
  switch ( typeof(handler) ) {
    case "string": frame.execscript(handler); break;
    case "function": handler();
  }
}

function printgeteventscope(frame) {
  var frameset = frame.document.all.tags("frameset");
  if ( frameset.length ) return frameset[0];
  return frame.document.body;
}
</script>