javascript code for select option

The select label in HTML, also the Asp:dropdownlist control in asp.net. How JavaScript operates on them first, the basic understanding Copy Code code as follows: var e = document.getElementById ("Selectid"); E. options= new

Javascript select operations are common in forms. You can search for a lot of related information on the Internet. Next we will introduce in detail the various methods of JS dynamic select operations, if you are interested, you can refer to the

[JavaScript] In the select drop-down list, multiple values are passed in the value, the option display value is taken out, and this is applied as the navigation, selectoption For the select drop-down list, we all know that the value is the value of

A problem occurred when deleting multiple select values today. After half a day, it was originally caused by the index (that is, when the index is deleted, it should be deleted from the large index and then deleted from the small index

1. Get the value and text,html code for select Select as follows: The code is as follows Copy Code onetwothree jquery Select operation The code is as follows Copy Code $ ("#mySelect"

HTML (select option) for Javascript I. Basic understanding: VaR E = Document. getelementbyid ("selectid "); E. Options = New Option ("text", "value "); // Create an option object, that is, create one or more text In the label. //

For a drop-down list select, it is well known that the value is the value in the selected option, but what if you need to take out the display value of each option? While it's not necessary to take the option's display value, if you do need the

document.getElementById ("louyuming"). Options[0].selected=true; function Jsselectisexititem (Objselect, Objitemvalue) {var isexit = false;for (var i = 0; i if (Objselect.options[i].value = = Objitemvalue) {Isexit = true;Break}}return isexit;} The

Yesterday, in the project encountered the cause of the option to show the exception, screenshot as follows: Firefox with CSS control after the effect CSS doesn't work in chrome and IE Code: The code is as follows Copy Code

We can see that when you forget to write the option value, these modern browsers will try to return the correct (the client programmer wants) result value, and its fault tolerance is better than IE678. As follows: The Code is as follows: If