How to assign the drop-down box by js,jQuery and easyui

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Js implementation:

1. By letting the I option select the I for the selected implementation, the code is as follows: (id is the drop-down box id)

(1) document.getElementById ("id") .options.selected = true

(2) document.getElementById ("messagetoid") .selectedIndex = 1; (select the first option)

two。 This is achieved by judging the value of option. The code is as follows:

Document.getElementById ("messagetoid") .value= ""; (check option with empty value)

JQuery implementation:

1. By selecting the I option, which is similar to the 1 implemented by js, the code is as follows:

$("# id") .get (0) .selectedIndex =

1; (select the first option)

two。 There are two ways to do this by judging the value of option. The code is as follows:

(1) $("# id") .val ("123"); (select option with a value of" 123")

(2) $("# messagetoid") .attr ("value", ""); (select option with empty value)

EasyUI implementation:

$('# id'). Combobox ('setValue','A'); (select option with a value of A)

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