我需要获取文本区域的用户选择区域，然后插入标记围绕它。我用它来获取用户选择的区域:vartextComponent=document.getElementById('article');varselectedText;if(document.selection!=undefined){textComponent.focus();varsel=document.selection.createRange();selectedText=sel.text;}//Mozillaversionelseif(textComponent.selectionStart!=undefined){vars