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JQuery introduction to getting and setting a single queue instance

Source: Internet
Author: User
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Radio Group radio is a common html control in html. Next I will introduce you to getting and setting the single-Choice Program code in jquery. For more information, see.

Radio Group radio: $ ("input [@ type = radio] [@ checked]"). val ();

Obtains the value of a set of radio selected items.
Var item = $ ("input [@ name = items] [@ checked]"). val ();
Obtain the text of the selected select item.
Var item = $ ("select [@ name = items] option [@ selected]"). text ();
The second element in the select drop-down box is the selected value.
$ ("# Select_id") [0]. selectedIndex = 1;
The second element of the radio Group is the currently selected value.
$ ("Input [@ name = items]"). get (1). checked = true;

Set Radio Group Value

Radio Group radio: $ ("input [@ type = radio]"). attr ("checked", "2"); // set the project with value = 2 to the current selected item (error

)
$ ("Input [@ name = radio_s] [@ value = 16]"). attr ("checked", true); (tested)


Example 1

The Code is as follows: Copy code

<Asp: RadioButtonList runat = "server" ID = "rblShow" class = "show"

RepeatDirection = "Horizontal">

<Asp: ListItem Text = "yes" value = "1"/>

<Asp: ListItem Text = "no" value = "0"/>

</Asp: RadioButtonList>

<P class = "isShow" style = "width: 500px">
Test text
</P>

Then add Jquery reference in script js.

The Code is as follows: Copy code


<Script type = "text/javascript">
$ (Function (){
$ (": Radio"). click (function (){
If ($ (this). val () = "1 "){
$ (". IsShow"). fadeIn ();
} Else {
$ (". IsShow"). fadeOut ();
}
})
})

Example 2

The Code is as follows: Copy code

<Html>
<Head>
<Script type = "text/javascript" src = "/ajaxjs/jquery1.3.2.js">
</Script>
<Script type = "text/javascript">
$ (Function (){
$ ("# Form1"). submit (function (){

If ($ ("# form1 input: checked ")){
Alert ($ ("# form1 input: checked"). val ());
}

Return false; // do not submit
});
});
</Script>
<Title> Single-region test </title>
</Head>
<Body>
<Form id = "form1">
<Input type = "radio" name = "items" id = "item1" value = "a"/>
<Br/>
<Input type = "radio" name = "items" id = "item2" value = "B"/> B
<Br/>
<Input type = "radio" name = "items" id = "item3" value = "c"/> C
<Br/>
<Input type = "radio" name = "items" id = "item4" value = "d"/> D
<Br/>
<Input type = "radio" name = "items" id = "item5" value = "e"/> E
<Br/>
<Input type = "radio" name = "items" id = "item6" value = "f"/> F
<Br/>
<Input type = "radio" name = "items" id = "item7" value = "g"/> G
<Br/>
<Input type = "radio" name = "items" id = "item8" value = "h"/> H
<Br/>
<Input type = "submit" id = "btn1">
</Form>
</Body>
</Html>

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