获取div编辑框，textarea，input text的光标位置 兼容IE，FF和Chrome的方法介绍_javascript技巧

<script src="jquery-1.4.4.js" type="text/javascript"></script>
<script type="text/javascript"> <br>//去除左右所有空格 <br>String.prototype.trim = function () { <br>return this.replace(/(^\s*)|(\s*$)/g, ""); <br>} <br>function getPosition(element) { <br>var OsObject = ""; <br>if (navigator.userAgent.indexOf("MSIE") > 0) { <br>OsObject = "MSIE"; <br>} <br>if (navigator.userAgent.indexOf("Firefox") > 0) { <br>OsObject = "Firefox"; <br>} <br>if (navigator.userAgent.indexOf("Safari") > 0) { <br>OsObject = "Safari"; <br>} <br>if (navigator.userAgent.indexOf("Camino") > 0) { <br>OsObject = "Camino"; <br>} <br>if (navigator.userAgent.indexOf("Gecko") > 0) { <br>OsObject = "Gecko"; <br>} <br>if (navigator.userAgent.indexOf("Chrome") > 0) { <br>OsObject = "Chrome"; <br>} <br><br>var result = 0; <br>if (!document.selection) { //非IE浏览器 <br>var thisTagName = null; <br>if ($(element).attr("tagName") != "TEXTAREA" && $(element).attr("tagName") != "INPUT") { <br>if ($(element).attr("tagName") == "DIV" && $(element).attr("contenteditable") == "true") { <br>thisTagName = window.getSelection().anchorNode.parentElement.tagName; <br>} //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果，转载请注明出处，谢谢！ <br>else { <br>thisTagName == null; <br>} <br>} <br>else { <br>if ($(element).attr("tagName") == "INPUT" && $(element).attr("type") == "text") { <br>thisTagName = window.getSelection().anchorNode.tagName; <br>} <br>else { <br>console.log(window.getSelection()); <br>thisTagName = window.getSelection().anchorNode.tagName; <br>} <br>} <br>console.log(thisTagName); <br>if (thisTagName == "TEXTAREA" || thisTagName == "INPUT" || (thisTagName=="BODY"&&OsObject == "Chrome")) { <br>result = element.selectionStart <br>} //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果，转载请注明出处，谢谢！ <br>else if (thisTagName != null) { <br>if (thisTagName == element.tagName) { <br>if (window.getSelection().anchorNode.textContent == $(element).text()) { <br>result = window.getSelection().anchorOffset; <br>} <br>else { <br>var currentIndex = window.getSelection().anchorOffset; <br>var txt = ""; <br>var txtoo = window.getSelection().anchorNode.previousSibling; <br>while (txtoo != null) { <br>txt += txtoo.textContent; <br>txtoo = txtoo.previousSibling; <br>} //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果，转载请注明出处，谢谢！ <br>result = txt.trim().length + currentIndex; <br>} <br>} <br>else { <br>var currentIndex = window.getSelection().anchorOffset; <br>var txt = ""; <br>var txtoo = window.getSelection().anchorNode.parentElement.previousSibling; <br>while (txtoo != null) { <br>txt += txtoo.textContent; <br>txtoo = txtoo.previousSibling; <br>} <br>result = txt.trim().length + currentIndex; <br>} <br>} //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果，转载请注明出处，谢谢！ <br>else { <br>return 0; <br>} <br>} else { //IE <br>var rng; <br>if ($(element).attr("tagName") == "TEXTAREA" || ($(element).attr("tagName") == "INPUT" && $(element).attr("type") == "text") || ($(element).attr("tagName") == "DIV" && $(element).attr("contenteditable") == "true")) { <br>element.focus(); <br>rng = document.selection.createRange(); <br>rng.moveStart('character', -element.innerText.length); <br>var text = rng.text; <br>for (var i = 0; i < element.innerText.length; i++) { <br>if (element.innerText.substring(0, i + 1) == text.substring(text.length - i - 1, text.length)) { <br>result = i + 1; <br>} <br>} <br>} //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果，转载请注明出处，谢谢！ <br>else { <br>return 0; <br>} <br>} <br>return result; <br>} <br><br>function getValue(element) { <br>var pos = getPosition(element); <br>document.getElementById("pnum").value = pos; <br>} <br><br></script>



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Hello,wellcome to test! 你好,欢迎测试! 注意源代码开闭合标记之间不能换行，否则统计错误！