Putting focus on a textbox in onchange event
I am trying to get it so that when a certain value is put into a textbox, the focus will stay on the textbox(and an alert will be shown in production). I am trying to get this to work in Firefox 3.5.7 with no luck.
How can I make it so when a 开发者_运维问答textbox is a certain value at onchange that it will stay focused/refocus on the textbox?
Live example is at http://jsbin.com/ipina
<body>
Enter your name: <input type="text" name="fname" id="fname" onchange="
if(this.value=='foo'){
this.select();
this.focus();
}
" />
</body>
Also, I don't get any javascript errors or warnings in the Error Console on executing this code.
When the onchange event is fired, the user is focused on the textbox.
Maybe you might want to use the blur event to re-focus on the textbox if the value is 'foo'.
If you need instantaneous results, you should use onkeyup.
<body>
Enter your name: <input type="text" name="fname" id="fname" onkeyup="
if(this.value=='foo'){
this.select();
this.focus();
}
" />
</body>
According to Javascript onchange different in IE and FireFox I needed to set the focus after the onchange event occurs, so I had to end up with something like this:
Enter your name: <input type="text" name="fname" id="fname" onblur="
if(this.value=='foo'){
alert('bah');
setTimeout('document.getElementById(\'fname\').focus();document.getElementById(\'fname\').select();',0);
}
" />
And also I had to catch it when the focus was lost, not necessarily when the text was changed, so I had to use onblur instead of onchange.
Live: http://jsbin.com/ofeva
加载中,请稍侯......
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