JavaScript gets/sets the cursor position, compatible with Input&&TextArea_javascript skills

<title>JavaScript gets/sets the cursor position, compatible with Input&&TextArea. </title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <style> body { margin: 32px; font-family: Verdana, sans-serif; font-size: 13px; } .title { font-size: 18px; font-weight: bolder;margin:40px 0; } .input { width: 50%; font-family: Verdana, sans-serif; font-size: 13px; text-indent: 2px; } </style> <div class="title"> </div>JavaScript gets/sets the cursor position, compatible with Input&&TextArea: <div class="title"> </div>Single line text box<p> <input class="input" id="textbox" name="textbox" value="Hi,www.jb51.net!!!"></p> <input type="button" onclick="alert( getPositionForInput( document.getElementById('textbox') ) )" value="Get Position"> <input type="text" id="no1" size="1"> Input location: <input type="button" onclick="process('no1','textbox');" value="Set Position"><div class="title"> </div>Multi-line text box<textarea id="zhangdanNum" name="zhangdanNum" style="height:66px;width:246px;overflow:hidden"> Hi,CssRain!!!<input type="button" onclick="alert( getPositionForTextArea( document.getElementById('zhangdanNum') ) )" value="Get Position"> <input type="text" id="no2" size="1"> Input location: <input type="button" onclick="process('no2','zhangdanNum');" value="Set Position">