jquery gets the input value in various cases

Gets whether the checked value of input is true:

The first type:

if ($ ("Input[name=item][value= ' Val ')"). attr (' checked ') ==true)//Determine if it has been ticked-note: name is the control Name property, value is the control's Value property

The second type: You can not specify a property value, because the value of a set of checkboxes will hold its corresponding ID in the database, preferably written as follows:if ($ ("Input[name=row_checkbox]"). attr (' checked ') ==true)The third type:if ($ ("[Name=row_checkbox]"). attr (' checked ') ==true)--Note: name is the control Name propertyjquery Radio value, checkbox value, select Value, Radio selected, CheckBox selected, select selected, and related article Category: Web Front end:Radio:Gets the value of a set of radio selected items: var item = $ (' input[name=items][checked] '). Val ();                                                     --Note: name is the control Name property 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's value = ' val ' element is currently selected: $ (' input[name=items] [value= ' V Al '] '). attr ("Checked", "checked"); Radio sets the element of the value=2 as the currently selected item: $ ("Input[type=radio"). attr ("Checked", ' 2′ '); Radio the value of the selected item: $ ("input[name= ' Radio_name '][checked]"). Val (); Set Radio as selected based on value: $ ("input[name= ' Radio_name ') [value= ' To select Radio Value ' "). attr (" Checked ", true);Select:Gets the text of the Select selected item: var item = $ ("select[@name =items] option[@selected]"). Text (); or var item = $ ("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; --Note: select_id ' is the control's ID property Select dropdown box value = ' val ' element is currently selected: $ ("Select[name=items] option[value= ' Val ']"). attr ("Selected"    , "selected"); Select sets the VALUE=-SEL3 item as the currently selected item: $ ("#sel"). attr ("value", '-sel3′ '); --Note: SEL is the ID property of the Select control to add the drop-down box of the option:$ ("<option value= ' 1′>1111</option><option value= ' 2′>2222< /option> "). AppendTo (" #sel "); Select empty: $ (" #sel "). empty ();checkbox:The second element of the checkbox is ticked: $ ("Input[name=items]"). Get (1). checked = true;  //tick checkbox value= ' val ' element tick: $ (" Input[name=item][value= ' Val '] "). attr (" Checked ", true);                                                    or $ ("Input[name=item][value= ' Val ')"). attr ("Checked", "checked"); Determine if the checkbox has been ticked: if ($ ("input[ Name=item][value= ' Val '). attr (' checked ') ==true)  jquery Gets the value values of the checkbox selection://Select the collection of selected checkbox elements If you want value values you need to traverse this set $ ($ ("Input[name= ' Checkbox_name '][checked]")). each (function () {arrchk+=this.value + ', ';    //Traverse the collection of selected checkbox elements to get value});  checkbox's Checked property: $ ("#checkbox_id"). attr ("checked"); Gets the status of a checkbox (there is no selected, returns True/false) $ ("#checkbox_id"). attr ("Checked", true); Sets the status of a checkbox to be checked (checked=true) $ ("#checkbox_id"). attr ("CHecked ", false); Set a checkbox with a status of unchecked (Checked=false)//According to the above three, analyze and analyze the meaning of this code: $ ("input[name= ' Checkbox_name ')"). attr ("Checked", $ ("# checkbox_id "). attr (" checked "));--note: The checked status for Name= ' Checkbox_name ' is assigned the same checked status according to the checkbox_id of the control,     Get Value:text box, text area: $ ("#txt"). attr ("value"), Multi-marquee checkbox:$ ("Input[name= ' checkbox ': Checked]"). each (function () {var val = $ (thi　　　　　　　　  s). Val (); }), Radio group radio:$ ("input[type=radio][checked]"). Val (); Drop-down box select value: $ (' select '). val (); Drop-down box select the text value selected: $ (" Select "). Find (" option:selected "). Text (); textbox, Text area: $ (" #txt "). attr (" value ","); Empty content $ ("#txt"). attr ("value", ' 11′ '); Populating contentEvent:triggered when the object text_id gets focus: $ ("#text_id"). focus (function () {//code ...}); triggered when the object text_id loses focus: $ ("#text_id"). blur (function () {//code ...});Other:Make the Vlaue value of the text box selected: $ ("#text_id"). Select (); $ ("#text_id"). Val (). Split (","); Returns an array of value values of text as ', ' delimited

jquery gets the input value in various cases