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 http://www.sharejs.com
        if(src.options[count].selected == true) {
   
                try {
                         src.remove(count, null);
                          
                 } catch(error) {
                          
                         src.remove(count);
                }
        }
    }
}


//javascript/8785