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select all options in select listbox by default -- javascript - Stack Overflow

Removing options from a List Box in client side Javascript We can remove the options from a list box by using client side JavaScript. You can see the article explaining how to add options to a list box using JavaScript. Here we will discuss on how to remove option on selection and removing all the options in one go. We will use different functions and connect them to buttons to execute them.

javascript - Jquery adding and removing items from listbox - Stack Overflow

Here are some functions and there uses in removing the options. You can see the demo of this program here.

While the page loads we will try to populate the list box by using onload event of the body tag. The list box will be filled with data at the time of display to the visitors. The detail on how to add options to list box you can get here. So we will go to the next step Removing all the options To remove all the options from the list box we will loop through all the elements of the list box and remove one by one.

We will use for loop to loop from 0 to selectbox.

HTML DOM Select remove() Method

The total length or the number of elements of the array we can get by using selectbox. Removing Selected Options We can remove the options one by one or by selecting more than one option and then by pressing the button. Here also we will use the similar function like above but before deleting we will check if the option is checked or not.

This way we will check all the elements of the list box and if they are checked then we will add the command selectbox. Here is the function.

So here is the function. SubCat, "One","One" ; addOption document. SubCat, "Two","Two" ; addOption document. SubCat, "Three","Three" ; addOption document.

SubCat, "Four","Four" ; addOption document. SubCat, "Five","Five" ; addOption document.

Each button is connected to one function with on click event handler. We recommend moving this block and the preceding CSS link to the HEAD of your HTML file. Basics and How to Manage Listbox using JavaScript ListBox Validation: Checking if option is selected before submitting a form ListBox Disable: Adding options to a listbox dynamically Moving Options Moving Options from a listbox to other Removing Options: Removing options from a listbox Copying List data: Copying user entered data from one to other form Dependant list box: Linking two dropdown listboxes list box with Data: Populating Listbox by taking data from MySQL table onChange listbox: Triggering JavaScript code when selected option is changed Listbox Menu: Redirecting page based on selection of listbox.

Adding options to a drop down list box Removing options from a drop down list box Moving options from one drop down list box to other Dynamic population of second list box based on value of first list box Datalist adding options. Manas Sinha Yes,It worked. Actually I used options.

Achmend I have many list boxes in one form. How do i clear all the list in all the boxes? Srinivas I dont need remove all ,remove and buttons there.

As soon as i select an item from the list it should get deleted. Form Validation in JavaScript Checkbox Validation of a form. I have many list boxes in one form. I dont need remove all ,remove and buttons there.