focusing on an input element with jquery

[Naveen puttu]

Hi Folks

i tried using

$("input[id=someBlah']").focus()

and it doesnt seem to work . so i changed it to what you see in the code below

$("input[id^='bid_']").livequery('blur',function()
    {
		
		var bid = $("input[id='someBlah']").val();
		if(bid=="" || bid==0 || bid<0)
		{

			alert($("input[id='bid_" + uid + "']").val());
			$("input[id='someBlah']").focus(function(){this.select();});
		}
		
    });

basically i want the control to go back the same text box if a inappropriate value is entered . Am i missing anything

Cheers
n4v33n

[Bear Bibeault]

Naveen puttu wrote:i tried using

$("input[id=someBlah']").focus()

and it doesnt seem to work

Of course not. What's returned from the $() function is a jQuery wrapped set, upon which you must call jQuery methods. The focus() method that (I think) you are trying to use is defined on the DOM elements, not jQuery. So in order to use focus, you must obtain the element from the jQuery wrapped set.

One way:

$('#someBlah').get(0).focus();    

This uses the jQuery get() method to obtain the element.

The jQuery wrapped set also acts like an array, so you could also use:

$('#someBlah')[0].focus();    

By the way using [id=whatever] in a selector would be considered sloppy, use the # notation when obtaining elements by id.

[Bear Bibeault]

The previous reply assumes that you want to set focus to the element. Is that true or not?

There is a focus() method for jQuery, but that does something very different: assigns an event handler for focus events.

Which did you intend to use? I had assumed the former.

[Naveen puttu]

Well Bear ,

Basically i want to bring back the control back the text input when user enters a wrong input and tabs out .

[Bear Bibeault]

Then I was correct -- you want to set focus to the input element. In that case, by examples stand.

[Naveen puttu]

Well Bear ,

I want the typing cursor to sit the text box and it doesnt seem to happen for some reason with your example

may be i wasnt clear about what i wanted

[Eric Pascarello]

The cursor should be in the textbox when you use focus(). If it is not, I would guess that the selector you are using is wrong.

Try to do

$('#someBlah')[0].css("background-color","yellow");

and see if the background color changes

Eric

[Naveen puttu]

Eric ,

When i use

var uid = jQuery(this).attr("id").split("_")[1];
var bid = $("input[id='bid_" + uid + "']").val();

I get the value of bid , but when i do

$("input[id='bid_" + uid + "']")[0].css({"background-color","yellow"});

I get an error message in firebug which says

invalid object intializer

What am i doing wrong

[Eric Pascarello]

$("input[id='bid_" + uid + "']")[0].css({"background-color","yellow"}); 

is not correct

using [0] or get(0) returns a DOM Object, not a jQuery Object. DOM objects do not have .css()

Why would you use [id=] when you can do

$("#id")

Eric