selectBox.js
上传用户:gzy2002
上传日期:2010-02-11
资源大小:1785k
文件大小:10k
- // -------------------------------------------------------------------
- // selectUnselectMatchingOptions(select_object,regex,select/unselect,true/false)
- // This is a general function used by the select functions below, to
- // avoid code duplication
- // -------------------------------------------------------------------
- function selectUnselectMatchingOptions(obj,regex,which,only) {
- var selected1 = null;
- var selected2 = null;
- var re = null;
- var i = 0;
- if (window.RegExp) {
- if (which == "select") {
- selected1=true;
- selected2=false;
- }
- else if (which == "unselect") {
- selected1=false;
- selected2=true;
- }
- else {
- return;
- }
- re = new RegExp(regex);
- for (i=0; i<obj.options.length; i++) {
- if (re.test(obj.options[i].text)) {
- obj.options[i].selected = selected1;
- }
- else {
- if (only == true) {
- obj.options[i].selected = selected2;
- }
- }
- }
- }
- }
-
- // -------------------------------------------------------------------
- // selectMatchingOptions(select_object,regex)
- // This function selects all options that match the regular expression
- // passed in. Currently-selected options will not be changed.
- // -------------------------------------------------------------------
- function selectMatchingOptions(obj,regex) {
- selectUnselectMatchingOptions(obj,regex,"select",false);
- }
- // -------------------------------------------------------------------
- // selectOnlyMatchingOptions(select_object,regex)
- // This function selects all options that match the regular expression
- // passed in. Selected options that don't match will be un-selected.
- // -------------------------------------------------------------------
- function selectOnlyMatchingOptions(obj,regex) {
- selectUnselectMatchingOptions(obj,regex,"select",true);
- }
- // -------------------------------------------------------------------
- // unSelectMatchingOptions(select_object,regex)
- // This function Unselects all options that match the regular expression
- // passed in.
- // -------------------------------------------------------------------
- function unSelectMatchingOptions(obj,regex) {
- selectUnselectMatchingOptions(obj,regex,"unselect",false);
- }
-
- // -------------------------------------------------------------------
- // sortSelect(select_object)
- // Pass this function a SELECT object and the options will be sorted
- // by their text (display) values
- // -------------------------------------------------------------------
- function sortSelect(obj) {
- var o = new Array();
- var i = 0;
- for (i=0; i<obj.options.length; i++) {
- o[o.length] = new Option( obj.options[i].text, obj.options[i].value, obj.options[i].defaultSelected, obj.options[i].selected) ;
- }
- o = o.sort(
- function(a,b) {
- if ((a.text+"") < (b.text+"")) { return -1; }
- if ((a.text+"") > (b.text+"")) { return 1; }
- return 0;
- }
- );
- for (i=0; i<o.length; i++) {
- obj.options[i] = new Option(o[i].text, o[i].value, o[i].defaultSelected, o[i].selected);
- }
- }
- // -------------------------------------------------------------------
- // selectAllOptions(select_object)
- // This function takes a select box and selects all options (in a
- // multiple select object). This is used when passing values between
- // two select boxes. Select all options in the right box before
- // submitting the form so the values will be sent to the server.
- // -------------------------------------------------------------------
- function selectAllOptions(obj) {
- for (var i=0; i<obj.options.length; i++) {
- obj.options[i].selected = true;
- }
- }
- // -------------------------------------------------------------------
- // selectAllOptions(select_object, hidden_object)
- // Used to send data to script as one variable with a delimiter
- // Added by Christopher Padfield on 22/10/2002
- // -------------------------------------------------------------------
- function submitAllOptions(obj, obj2) {
- var postVals = "";
- for (var i=0; i<obj.options.length; i++) {
- postVals = postVals == "" ? obj.options[i].value : postVals + "," + obj.options[i].value;
- }
- obj2.value = postVals;
- }
- // -------------------------------------------------------------------
- // moveSelectedOptions(select_object,select_object[,autosort(true/false)[,regex]])
- // This function moves options between select boxes. Works best with
- // multi-select boxes to create the common Windows control effect.
- // Passes all selected values from the first object to the second
- // object and re-sorts each box.
- // If a third argument of 'false' is passed, then the lists are not
- // sorted after the move.
- // If a fourth string argument is passed, this will function as a
- // Regular Expression to match against the TEXT or the options. If
- // the text of an option matches the pattern, it will NOT be moved.
- // It will be treated as an unmoveable option.
- // You can also put this into the <SELECT> object as follows:
- // onDblClick="moveSelectedOptions(this,this.form.target)
- // This way, when the user double-clicks on a value in one box, it
- // will be transferred to the other (in browsers that support the
- // onDblClick() event handler).
- // -------------------------------------------------------------------
- function moveSelectedOptions(from,to) {
- var i = 0;
- var o = null;
- // Unselect matching options, if required
- if (arguments.length>3) {
- var regex = arguments[3];
- if (regex != "") {
- unSelectMatchingOptions(from,regex);
- }
- }
- // Move them over
- for (i=0; i<from.options.length; i++) {
- o = from.options[i];
- if (o.selected) {
- to.options[to.options.length] = new Option( o.text, o.value, false, false);
- }
- }
- // Delete them from original
- for (i=(from.options.length-1); i>=0; i--) {
- o = from.options[i];
- if (o.selected) {
- from.options[i] = null;
- }
- }
- if ((arguments.length<3) || (arguments[2]==true)) {
- sortSelect(from);
- sortSelect(to);
- }
- from.selectedIndex = -1;
- to.selectedIndex = -1;
- }
- // -------------------------------------------------------------------
- // copySelectedOptions(select_object,select_object[,autosort(true/false)])
- // This function copies options between select boxes instead of
- // moving items. Duplicates in the target list are not allowed.
- // -------------------------------------------------------------------
- function copySelectedOptions(from,to) {
- var options = new Object();
- var i = 0;
- for (i=0; i<to.options.length; i++) {
- options[to.options[i].text] = true;
- }
- for (i=0; i<from.options.length; i++) {
- var o = from.options[i];
- if (o.selected) {
- if (options[o.text] == null || options[o.text] == "undefined") {
- to.options[to.options.length] = new Option( o.text, o.value, false, false);
- }
- }
- }
- if ((arguments.length<3) || (arguments[2]==true)) {
- sortSelect(to);
- }
- from.selectedIndex = -1;
- to.selectedIndex = -1;
- }
- // -------------------------------------------------------------------
- // moveAllOptions(select_object,select_object[,autosort(true/false)[,regex]])
- // Move all options from one select box to another.
- // -------------------------------------------------------------------
- function moveAllOptions(from,to) {
- selectAllOptions(from);
- if (arguments.length==2) {
- moveSelectedOptions(from,to);
- }
- else if (arguments.length==3) {
- moveSelectedOptions(from,to,arguments[2]);
- }
- else if (arguments.length==4) {
- moveSelectedOptions(from,to,arguments[2],arguments[3]);
- }
- }
- // -------------------------------------------------------------------
- // copyAllOptions(select_object,select_object[,autosort(true/false)])
- // Copy all options from one select box to another, instead of
- // removing items. Duplicates in the target list are not allowed.
- // -------------------------------------------------------------------
- function copyAllOptions(from,to) {
- selectAllOptions(from);
- if (arguments.length==2) {
- copySelectedOptions(from,to);
- }
- else if (arguments.length==3) {
- copySelectedOptions(from,to,arguments[2]);
- }
- }
- // -------------------------------------------------------------------
- // swapOptions(select_object,option1,option2)
- // Swap positions of two options in a select list
- // -------------------------------------------------------------------
- function swapOptions(obj,i,j) {
- var o = obj.options;
- var i_selected = o[i].selected;
- var j_selected = o[j].selected;
- var temp = new Option(o[i].text, o[i].value, o[i].defaultSelected, o[i].selected);
- var temp2= new Option(o[j].text, o[j].value, o[j].defaultSelected, o[j].selected);
- o[i] = temp2;
- o[j] = temp;
- o[i].selected = j_selected;
- o[j].selected = i_selected;
- }
-
- // -------------------------------------------------------------------
- // moveOptionUp(select_object)
- // Move selected option in a select list up one
- // -------------------------------------------------------------------
- function moveOptionUp(obj) {
- // If > 1 option selected, do nothing
- var selectedCount=0;
- for (i=0; i<obj.options.length; i++) {
- if (obj.options[i].selected) {
- selectedCount++;
- }
- }
- if (selectedCount > 1) {
- return;
- }
- // If this is the first item in the list, do nothing
- var i = obj.selectedIndex;
- if (i == 0) {
- return;
- }
- swapOptions(obj,i,i-1);
- obj.options[i-1].selected = true;
- }
- // -------------------------------------------------------------------
- // moveOptionDown(select_object)
- // Move selected option in a select list down one
- // -------------------------------------------------------------------
- function moveOptionDown(obj) {
- // If > 1 option selected, do nothing
- var selectedCount=0;
- for (i=0; i<obj.options.length; i++) {
- if (obj.options[i].selected) {
- selectedCount++;
- }
- }
- if (selectedCount > 1) {
- return;
- }
- // If this is the last item in the list, do nothing
- var i = obj.selectedIndex;
- if (i == (obj.options.length-1)) {
- return;
- }
- swapOptions(obj,i,i+1);
- obj.options[i+1].selected = true;
- }