以下是 示例 ：

$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ ）.get（0）;
var elemLen = el.value.length;

el.selectionStart = elemLen;
el.selectionEnd = elemLen;
el。 focus（）;
}）;

https： //developer.mozilla.org/en-US/docs/XUL/Property/selectionStart

https://developer.mozilla.org/en-US/docs/XUL/Property/selectionEnd

对于较老版本的IE，您可能需要使用： http://msdn.microsoft.com/en-us/library/ie/ms536401（v = vs.85）.aspx

I am loading a form and defaulting focus to the first text field. The text field is populated with a default value "PW-". (The first characters of the customers part number like PW-446, PW-9887)

They want to just start typing the numbers upon form load instead of clicking to the end of the field, etc to type numbers. The cursor should be blinking at the end of the PW- and ready to go for data input.

I have tried many different methods found on *** with no luck :-(
Any ideas? Thanks in advance!

JQUERY

$(document).ready(function(){

    $('input:text:first').focus();

});

HTML

< input type="text" name="part_id" size="20" value="PW-">

Here's an EXAMPLE:

$(document).ready(function(){
    var el = $("input:text").get(0);
    var elemLen = el.value.length;

    el.selectionStart = elemLen;
    el.selectionEnd = elemLen;
    el.focus();
});​

https://developer.mozilla.org/en-US/docs/XUL/Property/selectionStart

https://developer.mozilla.org/en-US/docs/XUL/Property/selectionEnd

For older versions of IE you may need to use: http://msdn.microsoft.com/en-us/library/ie/ms536401(v=vs.85).aspx