/*
* Extended helper methods for select-input-fields
*
* Author D. Hampton
*
*/
/*
* Returns the hidden value field of the current selection
*/
jQuery.fn.selectedVal = function() {
return $(this).selectedOption().val();
}

/*
* For check boxes.
*/
jQuery.fn.isChecked = function() {
return $(this).attr('checked');
}

/*
* Returns the entire selected option
*/
jQuery.fn.selectedOption = function() {
return $("#"+$(this).attr("id")+" :selected");
}

/*
* Returns the visible value field of the current selection
*/
jQuery.fn.selectedText = function() {
return $(this).selectedOption().text();
}

/*
* Returns an array of all available options
*/
jQuery.fn.getOptions = function() {
return $("#"+$(this).attr("id")+" option");
}

/*
* Will set the option who's value is passed in to this function as
* selected. All other options are not selected.
*/
jQuery.fn.setSelected = function(value) {
options = $(this).getOptions();
$.each(options, function() {
if ($(this).val()==value) $(this).attr("selected", "selected");
else $(this).attr("selected", false);
});
}

/*
* Add a new option to the end of a select box
*/
jQuery.fn.addOption = function(value, text) {
id = "#"+$(this).attr("id");
var option = document.createElement("option");
option.value = value;
option.text = text;
$(id).get(0)[$(id+' option').length] = option;
}

/*
* As it says on the tin...
*/
jQuery.fn.selectAll = function() {
$("#"+$(this).attr("id")+" *").attr("selected","selected");
}

/*
* Give this a URL, as long as the URL returns : pairs
* in JSON format the these values will be added to the select box
*/
jQuery.fn.loadJsonOptions = function(url) {
id = "#"+$(this).attr("id");
$.getJSON(url,
function(data){
$.each(data, function(i, item){
$(id).addOption(item.value, item.name);
});
});
}

/*
* Empties the select box
*/
jQuery.fn.clear = function() {
$("#"+$(this).attr("id")).children().remove();
}

/*
* Will move the selected item to the receiver, removing it from the initial
* select box.
*/
jQuery.fn.moveSelectedTo = function(receiver) {
id = "#"+$(this).attr("id");
o = $(id).selectedOption();
$(o).remove();
o.appendTo(receiver);
}