function fillItemType() { 	} // end of JS function	function SelectSubType(){// ON or after selection of itemType this function will workremoveAllOptions(document.frm_item.itemSubtypeId);	addOption(document.frm_item.itemSubtypeId, '', 'No SubitemType Selected', '0');}function removeAllOptions(selectbox){	var i;	for(i=selectbox.options.length-1;i>=0;i--)	{		//selectbox.options.remove(i);		selectbox.remove(i);	}}function addOption(selectbox, value, text,selected ){	var optn = document.createElement("OPTION");	optn.text = text;	optn.value = value;      if (selected==1)      {           optn.selected = true;      }       	selectbox.options.add(optn);}