<script> function inserttag(){ var text=document.getElementById('con'); text.focus(); var start=text.selectionStart; var end = text.selectionEnd; var ss = text.value.substring(start, end); alert(ss); //alert(start); } </script> <form action="" method="post"> <textarea name="text" id="con" cols="30" rows="10">The text selection appears here</textarea> <input type="submit" onclick="inserttag()" name="sub" value="OK"> </form>
用鼠标选取一块 效果图：
<html> <head> <title>Selection Start and End example</title> <script type="text/javascript"> function SelectSomeText () { var input = document.getElementById ("Textbox"); input.selectionStart = 4; input.selectionEnd = 13; } </script> </head> <body> <p><input type="text" id="Textbox" size="40" value="The text selection appears here"/></p> <p><button onclick="SelectSomeText ()">See selection</button></p> </body> </html>
效果图：
