代码网上找到的，不能用，也有可能是用法不对，做了一些修改，但还是不能通用，有时间了再说。
function printFrame(frame) {
if (printIsNativeSupport())
window.print2 = window.print;
window.print = printFrame;
if (this.parent.document.frames(frame).document.readyState !== "complete" ){
return;
}
if ( window.print2 ){ // IE5
var focused = document.activeElement;
this.parent.document.frames(frame).focus();
if (this.parent.document.frames(frame).print2)
this.parent.document.frames(frame).print2();
else
this.parent.document.frames(frame).print();
return;
}
var eventScope = printGetEventScope(this.parent.document.frames(frame));
var focused = document.activeElement;
window.printHelper = function() {
execScript("on error resume next: printWB.ExecWB 6, 1", "VBScript");
printFireEvent(this.parent.document.frames(frame), eventScope, "onafterprint");
printWB.outerHTML = "";
window.printHelper = null;
}
document.body.insertAdjacentHTML("beforeEnd","<object id=\"printWB\" width=0 height=0 \classid=\"clsid:8856F961-340A-11D0-A96B-00C04FD705A2\"></object>");
printFireEvent(this.parent.document.frames(frame), eventScope, "onbeforeprint");
this.parent.document.frames(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;
}