jQuery's method of obtaining and assigning values ​​​​to html elements_jquery

Jquery takes and assigns values ​​​​to basic controls TEXTBOX: var str = $('#txt').val(); $('#txt').val("Set Lbl Value"); //Text box , text area: $("#text_id").attr("value",'');//Clear content $("#text_id").attr("value",'test');//Fill content

TEXTBOX:

Copy code The code is as follows:

var str = $('# txt').val();
$('#txt').val("Set Lbl Value");

//Text box, text area:
$("#text_id").attr("value",'');//Clear the content
$("#text_id").attr(" value",'test');//Fill content

LABLE:

Copy code The code is as follows:

var str = $('# lbl').text();
$('#lbl').text("Set Lbl Value");

var valradio = $("input[@type=radio][@checked]").val();
var item = $('input[@name=items][@checked]'). val();
var checkboxval = $("#checkbox_id").attr("value");
var selectval = $('#select_id').val();
//Multiple selection Box checkbox:
$("#chk_id").attr("checked",'');//Make it unchecked
$("#chk_id").attr("checked",true) ;//Check
if($("#chk_id").attr('checked')==true) //Judge whether

radio group radio:

Copy code The code is as follows:

$("input[@type=radio]").attr ("checked",'2'); //Set the item with value=2 as the currently selected item

//Drop-down box select:
$("#select_id").attr("value" ,'test');//Set the item with value=test as the currently selected item
$("testtest2< ;/option>").appendTo("#select_id")//Add the option of the drop-down box
$("#select_id").empty();//Clear the drop-down box

Get a group The value of the selected radio item named (items)
var item = $('input[@name=items][@checked]').val();//If it is not selected, val() = undefined
Get the text of the selected item in select
var item = $("select[@name=items] option[@selected]").text();
select the second element of the drop-down box is the currently selected value
$('#select_id')[0].selectedIndex = 1;
The second element of the radio radio selection group is the currently selected value
$('input[@name=items ]').get(1).checked = true;

//Reset form
$("form").each(function(){
.reset();
});