selectadd.js

jsp程序开发系统

function addElement(inputname, selectname) {

	// get the field objects
	var input = document.getElementById(eval('inputname')); 
	var select = document.getElementById(eval('selectname')); 

	// add element
	select.options[select.options.length] = new Option(input.value, input.value);
	input.value = '';

}

function removeFrom(inputname, selectname) {

	// get the field objects
	var input = document.getElementById(eval('inputname')); 
	var select = document.getElementById(eval('selectname')); 

	if (select.selectedIndex == -1) {
		alert("Please select an item to remove");
		return false;
	}	

	for (i=select.options.length - 1;i>=0; i--) { 
	   if (select.options[i].selected) { 
		   select.options[i] = null; 
	   } 
   } 
}

function selectSubmit(selectname) {

	// select all the fields
	var select = document.getElementById(eval('selectname')); 
	for (i=select.options.length - 1;i>=0; i--) { 
	   select.options[i].selected = true;
   } 
}