jquery 实现 ASP.NET TextBox 多行文本的换行
1.页面内容
// 由华宰编写，在此鸣谢$.fn.extend({ position: function (value) { var elem = this[0]; if (elem && (elem.tagName == "TEXTAREA" || elem.type.toLowerCase() == "text")) { if ($.browser.msie) { var rng; if (elem.tagName == "TEXTAREA") { rng = event.srcElement.createTextRange(); rng.moveToPoint(event.x, event.y); } else { rng = document.selection.createRange(); } if (value === undefined) { rng.moveStart("character", -event.srcElement.value.length); return rng.text.length; } else if (typeof value === "number") { var index = this.position(); index > value ? (rng.moveEnd("character", value - index)) : (rng.moveStart("character", value - index)) rng.select(); } } else { if (value === undefined) { return elem.selectionStart; } else if (typeof value === "number") { elem.selectionEnd = value; elem.selectionStart = value; } } } else { if (value === undefined) return undefined; } }})$.fn.selectRange = function (start, end) { return this.each(function () { if (this.setSelectionRange) { this.focus(); this.setSelectionRange(start, end); } else if (this.createTextRange) { var range = this.createTextRange(); range.collapse(true); range.moveEnd('character', end); range.moveStart('character', start); range.select(); } });};参考内容：jquery 获取(设置)文本框(块)内光标位置插件 （在此感谢作者华宰）