jquery operations Drop-down list, text box, check box, Radio box collection

The

 jquery action drop-down list, text box, check box, and Radio box collection. Various actions related to jquery for Drop-down lists, text boxes, check boxes, and Radio boxes. The best way to make records and collections is

Various actions related to jquery for Drop-down lists, text boxes, check boxes, and Radio boxes. The best way to record and collect.   Traverse option and Add, remove option function Changeshipmethod (shipping) { var len = $ ("select[@name =ishiptype] option"). Length  if (shipping.value!= "CA") {  $ ("select[@name =ishiptype] option"). each (function () {   if ($ (this). val () = () {    $ (this). Remove ();    }  });  }else{  $ ("<option value= ' >ups ground</option>"). Appendto ($ ("select[@name =ishiptype]") ); &NBSP}} //Get the selection value of the Drop-down menu $ (#testSelect option:selected '). Text (); or $ ("#testSelect"). Find (' option:selected '). Text (); or $ ("#testSelect"). Val (); A bad memory can be collected under:   1, dropdown box:   var cc1   = $ ( ". FORMC select[@name = ' country '] option[@selected]"). Text (); Gets the text of the selected item in the Drop-down menu (note that there are spaces in the middle) var CC2 = $ ('. FORMC select[@name = ' country '] '). Val ();  //Get the selected value of the Drop-down menu var cc3 = $ ('. FORMC select[@name = ' country '] '). attr ("id"); Gets the id attribute value of the selected item for the Drop-down menu $ ("#select"). empty ();/Empty dropdown box//$ ("#select"). html ('); $ ("<option value= ' 1 ' >1111</option>"). Appendto ("#select")//Add drop-down box option   Explain a little bit: 1.select[@name = ' Country '] option[@selected] represents the option element with the selected attribute in the Select element with the name attribute and the value ' country '; you can see that a @ begins with a property.   2, Radio Box: $ ("input[@type =radio][@checked]"). Val ();  //Get the value of the selected item in the Radio box (note that there are no spaces in the middle) $ ("input[@type =radio][@value =2]"). attr ("Checked", ' checked '); Sets the value=2 of the radio box to the selected state. (Note that there are no spaces in between)   3, check box: $ ("input[@type =checkbox][@checked]"). Val (); Gets the value of the first item selected in the check box $ ("input[@type =checkbox][@checked]"). each (function () {//The check box is generally selected for more than one, so you can cycle output    alert ($ (this). Val ());    });   $ ("#chk1"). attr ("Checked", "")//Do not tick $ ("#chk2"). attr ("Checked", true);/tick if ($ ("#chk1"). attr (' checked ') = = Undefined) {}//To determine whether a check has been ticked     of course the jquery selector is powerful. There are many other ways.   <script src= "jquery-1.2.1.js" type= "Text/javascript" ></script> <script language= "JavaScript" Type= "Text/javascript" > $ (document). Ready (function () {$ ("#seLecttest "). Change (function () {       //alert (" Hello ");        //alert ($ (" # Selecttest "). attr (" name "));        //$ ("a") attr ("href", "xx.html");        //window.location.href= "xx.html";        //alert ($ ("#selectTest"). Val ());        alert ($ ("#selectTest option[@selected]"). text ());        $ ("#selectTest") attr ("Value", "2");  }); }); </script>   <a href= "#" >aaass</a>   <!--dropdown box--> <select id= "Selecttest" Selecttest "> <option value=" 1 ">11</option> <option value=" 2 ">22</option> <option value = "3" >33</option> <option value= "4" >44</option> <option value= "5" >55</option> < Option value= "6" >66</option> </select> jquery radio values, checkbox values, select values, Radio selected, checkbox selected, Select Select, and its related to get a set of radio the value of the selected item 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; The second element of the radio Radio Group is the currently selected value $ (' input[@name =items] '). Get (1). checked = true;   Get Value: text box, text area: $ ("#txt"). attr ("value"); multiple-selection box checkbox:$ ("#checkbox_id"). attr ("value"); 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   Multiple-selection box checkbox: $ (" #chk1 "). attr (" Checked "," ");/not tick                 $ ("#chk2"). attr ("Checked", true);/tick                 I F ($ ("#chk1"). attr (' checked ') ==undefined)//Determine whether the check has been ticked   Radio Group Radio: $ ("input[@type =radio]"). attr ("Checked", ' 2 '); /Set value=2 items for the current Check   dropdown box select: $ ("#sel"). attr ("value", '-sel3 ');//Set VALUE=-SEL3 project to current selected       & nbsp     $ ("≪optionvalue= ' 1 ' >1111</option><optionvalue= ' 2 ' > 2222</option> '). Appendto ("#sel")// Add drop-down box option             $ ("#sel"). Empty ()//Empty dropdown box   Gets a set of radio values of the selected item = $ (' Inpu t[@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; The second element of the radio Radio Group is the currently selected value $ (' input[@name =items] '). Get (1). checked = true;   Get Value: text box, text area: $ ("#txt"). attr ("value")   Multiple-selection box 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 contents $ ("#txt"). attr ("value", ' 11 ');/fill content   Multiple-selection box checkbox: $ ( "#chk1"). attr ("Checked", "")//Do not tick $ ("#chk2"). attr ("Checked", true);/tick if ($ ("#chk1"). attr (' checked ') ==undefined) To determine if a check has been made   Radio Group Radio: $ ("input[@type =radio]"). attr ("Checked", ' 2 ');//Set value=2 item is the current check   drop-down 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 ")//Add Option $ (" #sel ") to the Drop-down box. empty ();//Empty Drop-down box