jquery checkbox value, radio value, select Value, Radio selected

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 ();

The second element of the Select Drop-down box is the currently selected value

$ (' #select_id ') [0].selectedindex = 1;

Radio the second element of a radio group is the currently selected value

$ (' input[@name =items] '). Get (1). checked = true;

Get Value:

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

Multi-Marquee checkbox: $ ("#checkbox_id"). attr ("value");

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

Dropdown box Select: $ (' #sel '). Val ();

Control form elements:

text box, text area:

$ ("#txt"). attr ("Value", "");/empty content
$ ("#txt"). attr ("value", ' 11 ');//fill content

Multi-selection box checkbox:

$ ("#chk1"). attr ("Checked", "");/no tick.
$ ("#chk2"). attr ("Checked", true);/tick
if ($ ("#chk1"). attr (' checked ') ==undefined)//judge whether it has been ticked

Radio Group Radio:

$ ("input[@type =radio]"). attr ("Checked", ' 2 ');//Set value=2 item is currently selected

Dropdown box Select:

$ ("#sel"). attr ("value", '-sel3 ');//Set VALUE=-SEL3 item is currently selected

$ ("<option value= ' 1 ' >1111</option><option value= ' 2 ' >2222</option>"). Appendto ("#sel")// Option to add a drop-down box

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