JQuery + PHP get the Text and Value of the Selectoption trade-off (with the selected city instance)

JQuery + PHP get the Text and Value selected by Selectoption (with the selected city instance attached) PHP code: & lt; li & gt; & lt; spanclass & quot; l2 & quot; & gt; city & lt; span & gt; & jQuery + PHP obtain the Text and Value selected by Select option (see Select city instance)

PHP code:

                 
City                        Select the city<% Foreach from = $ supportcity item = city key = k %>Selected <%/if % >>< % $ city. city_name %><%/Foreach %>                
                
Region <% foreach from = $ supportcity item = city key = k %>                        Select Region<% Foreach from = $ city. areas item = area %><% $ Area. area %><%/Foreach %><%/Foreach %>

Jquery code:

        $("select.city").change(function(){            var ccode = $(this).val();            $("select.area").hide();            if(ccode){                $("select.area[citycode="+ccode+"]").show();            }        });        var sltcity = $("select.city").val();        if(sltcity){             $("select.area[citycode="+sltcity+"]").show();        }

The following is a detailed description:

Jquery radio, checkbox, select, radio, checkbox, select, and related settings

Obtain 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 ();

Obtain the text of the selected select item: var item =$ ("select [name = items] option [selected]"). text (); or $ ("select [name = items]"). find ("option: selected "). text ();

The second element in the select drop-down box is the selected value: $ ('# select_id') [0]. selectedIndex = 1;

The select drop-down box value = 'Val' element is the current selected item: $ ("select [name = items] option [value = 'Val']"). attr ("selected", "selected ");

The second element of the radio Group is currently selected: $ ('input [@ name = items] '). get (1 ). checked = true; or $ ('input [name = items] '). attr ("checked", '1 ′);

The value = 'Val' element of radio is currently selected: $ ('input [name = items] [value = 'Val'] '). attr ("checked", "checked ");

Get value:

Text box, text area: $ ("# txt"). attr ("value ");

Multiple choice box checkbox: $ ("input [name = 'checkbox': checked]"). each (function (){

Var val = $ (this). val ();

});

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

Value of select in the drop-down box: $ ('select'). val ();

Select the selected text value in the drop-down box: $ ("select"). find ("option: selected"). text ();

Control form elements:

Text box, text area: $ ("# txt"). attr ("value", "); // clear the content

$ ("# Txt"). attr ("value", '11'); // fill in the content

Multiple selection box checkbox:
The second element of the checkbox is checked: $ ("input [name = items]"). get (1). checked = true; // Check
$ ("Input [name = items]"). get (1). checked = false; // do not check

Check the value = 'Val 'element of the checkbox: $ ("input [name = item] [value = 'Val']"). attr ("checked", true); or $ ("input [name = item] [value = 'Val']"). attr ("checked", "checked ");

If ($ ("input [name = item] [value = 'Val']"). attr ('checked') = true) // You can check whether a check is performed.

Radio Group radio: $ ("input [type = radio]"). attr ("checked", '2'); // set the project with value = 2 as the currently selected item

Drop-down box select: $ ("# sel"). attr ("value", '-sel3'); // set the value =-sel3 project to the currently selected item

$ ("2222"). AppendTo (" # sel ") // add the option in the drop-down box

$ ("# Sel"). empty (); // clear the drop-down list

JQuery obtains the Value selected by Radio.

Code

$ ("Input [name = 'Radio _ name'] [checked]"). val (); // select the Value of the selected radio
$ ("# Text_id"). focus (function () {// code...}); // event triggered when the object text_id gets the focus
$ ("# Text_id"). blur (function () {// code...}); // triggered when the focus of the object text_id is lost
$ ("# Text_id"). select (); // Set the Vlaue value of the text box to the selected status.
$ ("Input [name = 'Radio _ name'] [value = 'value to select the Value of radio '").
Attr ("checked", true); // Set Radio to the selected status based on the Value.

JQuery obtains the Value selected by the CheckBox.

$ ("Input [name = 'checkbox _ name'] [checked]"); // select the set of checked checkbox elements. if you want to get the Value, you need to traverse the set.
$ ("Input [name = 'checkbox _ name'] [checked]").
Each (function () {arrChk + = this. value + ',' ;}); // traverses the set of checked CheckBox elements to obtain the Value.
$ ("# Checkbox_id"). attr ("checked"); // gets the status of a CheckBox (true/false if any CheckBox is selected)
$ ("# Checkbox_id"). attr ("checked", true); // Set the status of a CheckBox to select (checked = true)
$ ("# Checkbox_id"). attr ("checked", false); // Set the status of a CheckBox to unselected (checked = false)
$ ("Input [name = 'checkbox _ name']"). attr
("Checked", $ ("# checkbox_id"). attr ("checked"); // You can analyze the meaning of the code based on 3, 4, and 5.
$ ("# Text_id"). val (). split (","); // returns an array separated ','.

Jquery1.3.2

ISDARK: $ ("input [@ type = radio] [name = ISDARK] [checked]"). val ()

$ ("Input [name = radioname] [value = radio value]"). attr ("checked", "checked ");