Jquery+php gets the text and value of select option Trade-offs (with Select City instance)

Jquery+php gets the text and value selected by Select option (with Select City instance)

PHP Code:

                 
                    Location of the city                                            Choose your city <%foreach from= $supportcity item=city key=k%>selected<%/if%> ><%$city.city_name%>                        <%/foreach%>                                    
  value="<%$k%>">selected<%/if%> ><%$city.city_name%>                        <%/foreach%>                                     >                
                area <%foreach from= $supportcity item=city key=k%>                        Choose your area <%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 ();        

Here are the details:

jquery Radio value, checkbox value, select Value, Radio selected, CheckBox selected, select selected, and its related settings

gets the value of a set of radio selected items:var item = $ (' input[name=items][checked] '). Val ();
gets the text of the Select selected item:var item = $ ("select[@name =items] option[@selected]"). Text ();

gets the text of the Select selected item:var item = $ ("Select[name=items] option[selected]"). Text (); or $ ("Select[name=items]"). Find ("option:selected"). Text ();

the second element of the Select drop-down box is the currently selected value:$ (' #select_id ') [0].selectedindex = 1;

Select drop-down box value = ' val ' element is currently selected:$ ("Select[name=items] option[value= ' Val ']"). attr ("Selected", "Selected");

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

Radio value = ' val ' element is currently selected:$ (' input[name=items] [value= ' Val '] '). attr ("Checked", "checked");

Get Value:

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

multiple Marquee checkbox:$ ("Input[name= ' checkbox ': Checked]"). each (function () {

var val = $ (this). Val ();

});

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

The value of the drop-down box select is: $ (' select '). val ();

Drop -down box select the text value selected:$ ("select"). Find ("option:selected"). Text ();

Control form elements:

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

$ ("#txt"). attr ("value", ' 11′ '); Populating content

Multiple marquee checkbox:
the second element of the checkbox is ticked:$ ("Input[name=items]"). Get (1). checked = true; Tick
$ ("Input[name=items]"). Get (1). checked = false; No tick.

checkbox of value= ' val ' element before tick:$ ("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)//Determine if a tick has been made

Radio Group Radio: $ ("Input[type=radio]"). attr ("Checked", ' 2′ ');//Set value=2 items as the current selection

Drop- down box select: $ ("#sel"). attr ("value", '-sel3′ ');//Set the VALUE=-SEL3 item as the current selection

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

$ ("#sel"). empty ();//Empty drop-down box

jquery Gets the value of the radio selection

Code

$ ("Input[name= ' Radio_name '][checked]"). Val (); Select the value of the selected radio
$ ("#text_id"). focus (function () {//code ...}); Event triggered when object text_id gets focus
$ ("#text_id"). blur (function () {//code ...}); Event triggered when object text_id loses focus
$ ("#text_id"). Select (); Make the Vlaue value of the text box selected
$ ("Input[name= ' radio_name '][value= ' to select Radio Value '").
attr ("Checked", true); Set Radio to selected based on value values

jquery Gets the value of the checkbox selection

$ ("Input[name= ' Checkbox_name '][checked]"); Select a collection of selected checkbox elements if you want value values you need to traverse this collection
$ ($ ("Input[name= ' Checkbox_name '][checked]")).
each (function () {arrchk+=this.value + ', ';}); /Traverse the collection of selected checkbox elements to get value values
$ ("#checkbox_id"). attr ("checked"); Gets the status of a checkbox (there is no selection, return true/false)
$ ("#checkbox_id"). attr ("Checked", true); Set the status of a checkbox to checked (checked=true)
$ ("#checkbox_id"). attr ("checked", false); Set the status of a checkbox to unchecked (Checked=false)
$ ("Input[name= ' Checkbox_name ']"). attr
("Checked", $ ("#checkbox_id"). attr ("checked"));//According to the 3,4,5 bar, you can analyze the meaning of this Code
$ ("#text_id"). Val (). Split (","); Returns an array of value values of text as ', ' delimited

jquery1.3.2

Isdark: $ ("input[@type =radio][name=isdark][checked]"). Val ()

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

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