Deleting Multiple Values From Listbox in JavaScript

    <select id="lsbox" name="lsbox" size="10" multiple="">
        <option value="1">India</option>
        <option value="2">United States</option>
        <option value="3">China</option>
        <option value="4">Italy</option>
        
        <option value="6">Canada</option>
        <option value="7">France</option>
        <option value="8">United Kingdom</option>
    </select> <br>
<button onclick="selectBoxRemove('lsbox');">Delete Selected Options</button>
<script>
function selectBoxRemove(sourceID) {

    //get the listbox object from id.
    var src = document.getElementById(sourceID);

    //iterate through each option of the listbox
    for(var count= src.options.length-1; count >= 0; count--) {

         //if the option is selected, delete the option
        if(src.options[count].selected == true) {

                try {
                         src.remove(count, null);

                 } catch(error) {

                         src.remove(count);
                }
        }
    }
}

</script>