JQuery control drop-down list, jquery drop-down list

JQuery control drop-down list, jquery drop-down list

// Traverse option and add and 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 () = 111) {$ (this ). remove () ;}}) ;}else {$ ("<option value = '000000'> UPS Ground </option> "). appendTo ($ ("select [@ name = ISHIPTYPE]") ;}// obtain the value of the drop-down menu $ (# testSelect option: selected '). text (); or $ ("# testSelect "). find ('option: selected '). text (); or $ ("# testSelect "). val ();

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If your memory is poor, you can add it to your favorites:
1. drop-down box:

Var C0 = $ (". formc select [@ name = 'country'] option [@ selected] "). text (); // get the text of the selected item in the drop-down menu (note that there is a space in the middle) var cc2 = $ ('. formc select [@ name = "country"] '). val (); // obtain the value of the selected item from the drop-down menu var cc3 = $ ('. formc select [@ name = "country"] '). attr ("id"); // get the ID attribute value of the selected item from the drop-down menu $ ("# select "). empty (); // clear the drop-down box // $ ("# select" example .html (''); $ ("<option value = '1'> 1111 </option> "). appendTo ("# select") // Add the option in the drop-down box

A little explanation:
1. select [@ name = 'country'] option [@ selected] indicates that the name attribute exists,
In addition, the select element with the selected attribute in the 'country' select element has the selected attribute;
It can be seen that the attribute is followed by the @ parameter.

2, single region:

$ ("Input [@ type = radio] [@ checked]"). val (); // get the value of the selected item of a single sequence (note that there is no space in the middle) $ ("input [@ type = radio] [@ value = 2]"). attr ("checked", 'checked'); // set single checked value = 2 to the selected status. (Note that there is no space in the middle)

3. Check box:

$ ("Input [@ type = checkbox] [@ checked]"). val (); // obtain the value of the first check box $ ("input [@ type = checkbox] [@ checked]"). each (function () {// Since multiple check boxes are selected, You can output alert ($ (this) cyclically ). val () ;}); $ ("# chk1 "). attr ("checked", ''); // do not tick $ (" # chk2 "). attr ("checked", true); // tick if ($ ("# chk1 "). attr ('checked') = undefined) {} // checks whether the check has been completed.

Of course, jquery's selector is powerful. There are many other methods.

<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"); // $ (""). attr ("href", "xx.html"); // window. location. href = "xx.html"; // alert ($ ("# selectTest "). val (); alert ($ ("# selectTest option [@ selected]"). text (); $ ("# selec TTest "). attr (" value "," 2 ") ;}) ;}; </script> <a href =" # "> aaass </a> <! -- Drop-down box --> <select id = "selectTest" name = "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 value, checkbox, select, radio, checkbox, and select, obtain the value of a set of radio selected items var item =$ ('input [@ name = items] [@ checked] '). val (); get the text var item of the selected select item =$ ("select [@ name = items] option [@ selected]"). text (); the second element in the select drop-down box is the currently selected value $ ('# select_id') [0]. selectedIndex = 1; the second element of the radio Group is the currently selected value $ ('input [@ name = items] '). get (1 ). checked = true; Value: text box, text area: $ ("# txt "). attr ("value"); multiple choice box checkbox: $ ("# checkbox_id "). attr ("value"); radio Group radio: $ ("input [@ type = radio] [@ checked]"). val (); drop-down box select: $ ('# sel '). val (); control form element: text box, text area: $ ("# txt "). attr ("value", ''); // clear the content $ (" # txt "). attr ("value", '11'); // multiple-choice box for filling content checkbox: $ ("# chk1 "). attr ("checked", ''); // do not tick $ (" # chk2 "). attr ("checked", true); // tick if ($ ("# chk1 "). attr ('checked') = undefined) // determines whether the radio group radio has been checked: $ ("input [@ type = radio]"). attr ("checked", '2'); // select: $ ("# sel") for the project whose value is set to 2 "). attr ("value", '-sel3 '); // set the value =-sel3 project to the selected item $ ("<optionvalue = '1'> 1111 </option> <optionvalue = '2'> 2222 </option> "). appendTo ("# sel") // Add option $ ("# sel") in the drop-down box "). empty (); // clear the drop-down box to obtain the value of a set of radio selected items var item =$ ('input [@ name = items] [@ checked] '). val (); get the text var item of the selected select item =$ ("select [@ name = items] option [@ selected]"). text (); the second element in the select drop-down box is the currently selected value $ ('# select_id') [0]. selectedIndex = 1; the second element of the radio Group is the currently selected value $ ('input [@ name = items] '). get (1 ). checked = true; Value: text box, text area: $ ("# txt "). attr ("value"); multiple choice box checkbox: $ ("# checkbox_id "). attr ("value"); radio Group radio: $ ("input [@ type = radio] [@ checked]"). val (); drop-down box select: $ ('# sel '). val (); control form element: text box, text area: $ ("# txt "). attr ("value", ''); // clear the content $ (" # txt "). attr ("value", '11'); // multiple-choice box for filling content checkbox: $ ("# chk1 "). attr ("checked", ''); // do not tick $ (" # chk2 "). attr ("checked", true); // tick if ($ ("# chk1 "). attr ('checked') = undefined) // determines whether the radio group radio has been checked: $ ("input [@ type = radio]"). attr ("checked", '2'); // select: $ ("# sel") for the project whose value is set to 2 "). attr ("value", '-sel3 '); // set the value =-sel3 project to the currently selected item $ ("<option value = '1'> 1111 </option> <option value = '2'> 2222 </ option> "). appendTo ("# sel") // Add option $ ("# sel") in the drop-down box "). empty (); // clear the drop-down list