Use jquery to simplify the operation of Radio,checkbox,select,radio form elements

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

Get Value:

text box, text area: $ ("#txt"). attr ("value");
Multi Box checkbox:$ ("#checkbox_id"). attr ("value");
Radio Group Radio: $ ("input[@type =radio][@checked]"). Val ();
Drop-down box select: $ (' #sel '). Val ();

Control form elements:
text box, text area: $ ("#txt"). attr ("Value", "");//Clear Contents
$ ("#txt"). attr ("value", ' 11 ');//fill content

multiple marquee checkbox: $ (" #chk1 "). attr (" Checked "," ");//Do not tick
                            $ ("#chk2 "). attr (" Checked ", true);//Tick
                            if ($ ("#chk1"). attr (' checked ') ==undefined)//Determine if a tick has been made

Radio Group Radio: $ ("input[@type =radio]"). attr ("Checked", ' 2 ');//Set value=2 for the currently selected item
Drop-down box select: $ ("#sel"). attr ("value", '-sel3 ');//Set VALUE=-SEL3 items for the currently selected front end frame share
$ ("<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

Use jquery to simplify the operation of Radio,checkbox,select,radio form elements