Display selected text in textarea in Mozilla_javascript skills

In the past, createRange was used to determine the text selected in textarea. Although Mozilla also supports this attribute, it does not work when placed in textarea.
Later I found out that there are other ways to solve Mozilla’s problem.

<title>Textarea select</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="keywords" content="php,mysql,wap,javacript,xhtml,xml,wml,svg,,,mobile"> <div> <input type="button" onclick="doS()" value="显示选中的文字"> </div> <textarea id="inTextarea" cols="60" rows="10">