1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> 5 <title>选择文本然后全选</title> 6 <script type="text/javascript" src="eventutil.js"></script> 7 </head> 8 <body> 9 <form action="#"> 10 <input name="textbox1" type="text" value="test code" /> 11 <!-- <textarea name="textbox1">test code</textarea> --> 12 </form> 13 <script type="text/javascript" src="test03.js"></script> 14 </body> 15 </html>
1 var textbox = document.forms[0].elements["textbox1"]; 2 3 function selectText(textbox, startIndex, stopIndex) { 4 if (textbox.setSelectionRange) { 5 textbox.setSelectionRange(startIndex, stopIndex); 6 } else if (textbox.createTextRange) { 7 var range = textbox.createTextRange(); 8 range.collapse(true); 9 range.moveStart("character", startIndex); 10 range.moveEnd("character", stopIndex - startIndex); 11 range.select(); 12 } 13 textbox.focus(); 14 } 15 16 textbox.value = "Hello world!"; 17 console.log(textbox.value); 18 19 //选择所有文本 20 selectText(textbox, 0, textbox.value.length); 21 22 //选择前3个字符 23 selectText(textbox, 0, 3); 24 25 //选择第4到第6字符 26 selectText(textbox, 4, 7);