demo效果如下：
html代码部分如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>js获取编辑框游标的位置</title> <script src="http://www.w3school.com.cn/jquery/jquery-1.11.1.min.js" type="text/javascript"></script> <style type="text/css"> #Div1, #Div2 { width: 500px; height: 100px; border: solid 1px black; } </style> </head> <body> <button type="button" id="ddddd" > 插入字符 </button> <div contentEditable="true" style="height:50px; border:2px solid red;" id="test"> dasdsadasdasdasd<img src="http://www.cnblogs.com/images/xml.gif" alt="订阅">dasdasdasdasdsadsa </div> </body> </html> <script> $('#ddddd').click(function(){ document.getElementById('test').focus(); insertHtmlAtCaret('<img src="http://www.cnblogs.com/images/xml.gif" />'); }) function insertHtmlAtCaret(html) { var sel, range; if (window.getSelection) { sel = window.getSelection(); if (sel.getRangeAt && sel.rangeCount) { range = sel.getRangeAt(0); range.deleteContents(); var el = document.createElement("div"); el.innerHTML = html; var frag = document.createDocumentFragment(), node, lastNode; while ( (node = el.firstChild) ) { lastNode = frag.appendChild(node); } range.insertNode(frag); if (lastNode) { range = range.cloneRange(); range.setStartAfter(lastNode); range.collapse(true); sel.removeAllRanges(); sel.addRange(range); } } } else if (document.selection && document.selection.type != "Control") { // IE < 9 document.selection.createRange().pasteHTML(html); } } </script>