Remove item From Array in JavaScript

Try this..

function removeByElement(arrayName, arrayElement) {  //Remove Selected items

            for (var i = 0; i < arrayName.length; i++) {

                if (arrayName[i] == arrayElement)

                    arrayName.splice(i, 1);

            }

        }

function removeAllOptions(selectbox) {      //Remove All items

            var i;

            for (i = selectbox.options.length - 1; i >= 0; i--) {

                selectbox.remove(i);

            }

        }