Código PHP:
var singleSelect = true; // Allows an item to be selected once only
var sortSelect = true; // Only effective if above flag set to true
var sortPick = true; // Will order the picklist in sort sequence
// Initialise - invoked on load
function initIt() {
var selectList = document.getElementById("SelectList");
var selectOptions = selectList.options;
var selectIndex = selectList.selectedIndex;
var pickList = document.getElementById("PickList");
var pickOptions = pickList.options;
pickOptions[0] = null; // Remove initial entry from picklist (was only used to set default width)
if (!(selectIndex > -1)) {
selectOptions[0].selected = true; // Set first selected on load
selectOptions[0].defaultSelected = true; // In case of reset/reload
}
selectList.focus(); // Set focus on the selectlist
}
// Adds a selected item into the picklist
function addIt() {
var selectList = document.getElementById("SelectList");
var selectIndex = selectList.selectedIndex;
var selectOptions = selectList.options;
var pickList = document.getElementById("PickList");
var pickOptions = pickList.options;
var pickOLength = pickOptions.length;
// An item must be selected
while (selectIndex > -1) {
pickOptions[pickOLength] = new Option(selectList[selectIndex].text);
pickOptions[pickOLength].value = selectList[selectIndex].value;
// If single selection, remove the item from the select list
if (singleSelect) {
selectOptions[selectIndex] = null;
}
if (sortPick) {
var tempText;
var tempValue;
// Sort the pick list
while (pickOLength > 0 && pickOptions[pickOLength].value < pickOptions[pickOLength-1].value) {
tempText = pickOptions[pickOLength-1].text;
tempValue = pickOptions[pickOLength-1].value;
pickOptions[pickOLength-1].text = pickOptions[pickOLength].text;
pickOptions[pickOLength-1].value = pickOptions[pickOLength].value;
pickOptions[pickOLength].text = tempText;
pickOptions[pickOLength].value = tempValue;
pickOLength = pickOLength - 1;
}
}
selectIndex = selectList.selectedIndex;
pickOLength = pickOptions.length;
}
selectOptions[0].selected = true;
}
// Deletes an item from the picklist
function delIt() {
var selectList = document.getElementById("SelectList");
var selectOptions = selectList.options;
var selectOLength = selectOptions.length;
var pickList = document.getElementById("PickList");
var pickIndex = pickList.selectedIndex;
var pickOptions = pickList.options;
while (pickIndex > -1) {
// If single selection, replace the item in the select list
if (singleSelect) {
selectOptions[selectOLength] = new Option(pickList[pickIndex].text);
selectOptions[selectOLength].value = pickList[pickIndex].value;
}
pickOptions[pickIndex] = null;
if (singleSelect && sortSelect) {
var tempText;
var tempValue;
// Re-sort the select list
/*while (selectOLength > 0 && selectOptions[selectOLength].value < selectOptions[selectOLength-1].value) {
tempText = selectOptions[selectOLength-1].text;
tempValue = selectOptions[selectOLength-1].value;
selectOptions[selectOLength-1].text = selectOptions[selectOLength].text;
selectOptions[selectOLength-1].value = selectOptions[selectOLength].value;
selectOptions[selectOLength].text = tempText;
selectOptions[selectOLength].value = tempValue;
selectOLength = selectOLength - 1;
}*/
}
pickIndex = pickList.selectedIndex;
selectOLength = selectOptions.length;
}
}
// Selection - invoked on submit
function selIt(btn) {
var pickList = document.getElementById("PickList");
var pickOptions = pickList.options;
var pickOLength = pickOptions.length;
if (pickOLength < 1) {
alert("No ha seleccionado ningún elemento.");
return false;
}
for (var i = 0; i < pickOLength; i++) {
pickOptions[i].selected = true;
}
return true;
}
Gracias.
