代码如下：
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin var text = ""; function getActiveText(e) { text = (document.all) ? document.selection.createRange().text : document.getSelection(); document.theform.text.value = text; return true; } document.onmouseup = getActiveText; if (!document.all) document.captureEvents(Event.MOUSEUP); // End --> </script> <center> <form name=theform> 被选中的文本: <input type=text name=text value=""> </form> </center>