jquery operation Select (value, set selected)

Every time the operation of the Select, always to come out to turn over the information, as a summary of their own, after the turn over here.

such as <select class= "selector" ></select>

1. Set value to Pxx item selected

$ (". Selector"). Val ("Pxx");

2. Set text to Pxx to select

$ (". Selector"). Find ("option[text= ' Pxx ')"). attr ("selected", true);

Here is the use of a bracket, preceded by the attribute name in parentheses, without quotation marks. In many cases, the use of brackets can make logic very simple.

3. Gets the value of the currently selected item

$ (". Selector"). Val ();

4. Gets the text of the currently selected item

$ (". Selector"). Find ("option:selected"). Text ();

Using a colon here, mastering its usage and extrapolate will also make the code concise.

There are many times when a select cascade is used, that is, the value of the second select changes with the value selected in the first select. This is very simple in jquery.

such as: $ (". Selector1"). Change (function () {

Clear the second one first.

$ (". Selector2"). empty ();

In real-world applications, the option here is typically generated by looping multiple

var option = $ ("<option>"). Val (1). Text ("Pxx");

$ (". Selector2"). Append (option);

});

Http://www.cnblogs.com/yaoshiyou/archive/2010/08/24/1806939.html

jquery Gets the text and value of the Select selection:
Syntax Explanation:
1. $ ("#select_id"). Change (function () {//code ...});   //Add an event for select, triggering
2. Var checktext=$ ("#select_id") when you select one of the items. Find ("option:selected"). Text (); // Gets the text
3. Var checkvalue=$ ("#select_id") selected by the Select. Val (); //Gets the value of select selected
4. var checkindex=$ ("# select_id "). Get (0) .selectedindex; //Gets the index value of select selected
5. var maxindex=$ ("#select_id option:last"). attr ("index"); //Get Select Maximum index value
jquery sets the text and value selected for select:
Syntax Explanation:
1. $ ("#select_id"). Get (0) .selectedindex=1; //Set the Select index value to 1 to select
2. $ ("#select_id"). Val (4);  //sets the value of the Select to 4 to select
3. $ ("#select_id option[text= ' jquery ']"). attr ("selected", True);  //sets the text value of the Select to be selected for jQuery items

jquery Add/Remove option for select:
Syntax Explanation:
1. $ ("#select_id"). Append ("<option value= ' value ' >Text</option>"); Append an option to the Select (drop-down item)
2. $ ("#select_id"). Prepend ("<option value= ' 0 ' > Please select </option>"); Insert an option for select (first position)
3. $ ("#select_id option:last"). Remove (); Delete index value in select maximum option (last)
4. $ ("#select_id option[index= ' 0 ']"). Remove (); Delete option with index value 0 in select (first)
5. $ ("#select_id option[value= ' 3 ']"). Remove (); Delete option for value= ' 3 ' in select
5. $ ("#select_id option[text= ' 4 ']"). Remove (); Delete option for text= ' 4 ' in select

Http://www.cnblogs.com/SAL2928/archive/2008/10/28/1321285.html

jquery Radio value, checkbox value, select Value, Radio selected, CheckBox selected, select selected, and its related
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
$ (' 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", "");//No 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 the VALUE=-SEL3 item as the current selection
$ ("<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

jquery operation Select (value, set selected)