如图所示点击一个表单出现一弹出层，如何用键盘的上下左右去控制他们 上一个 下一个
我写了一个效果但是我按上下左右，返回的都是第一个，求大神指点一下。此外说明我用的是基于jq 的easyui插件
代码如下，感兴趣的看下面的完整版代码，嫌麻烦的看控制键盘上下左右的精简版代码
/**
* combo - jQuery EasyUI
*
* Licensed under the GPL:
* http://www.gnu.org/licenses/gpl.txt
*
* Copyright 2010 stworthy [ stworthy@gmail.com ]
*
* Dependencies:
* panel
* validatebox
*
*/
(function($){
function setSize(target, width){
var opts = $.data(target, 'combo').options;
var combo = $.data(target, 'combo').combo;
var panel = $.data(target, 'combo').panel;
if (width) opts.width = width;
if (isNaN(opts.width)){
opts.width = combo.find('input.combo-text').outerWidth();
}
var arrowWidth = combo.find('.combo-arrow').outerWidth();
var width = opts.width - arrowWidth;
combo.find('input.combo-text').width(width);
panel.panel('resize', {
width: (opts.panelWidth ? opts.panelWidth : combo.outerWidth()),
height: opts.panelHeight
});
}
/**
* create the combo component.
*/
function init(target){
$(target).hide();
var span = $('<span class="combo"></span>').insertAfter(target);
var input = $('<input type="text" class="combo-text">').appendTo(span);
$('<span><span class="combo-arrow"></span></span>').appendTo(span);
$('<input type="hidden" class="combo-value">').appendTo(span);
var panel = $('<p class="combo-panel"></p>').appendTo('body');
panel.panel({
doSize:false,
closed:true,
style:{
position:'absolute'
},
onOpen:function(){
$(this).panel('resize');
}
});
var name = $(target).attr('name');
if (name){
span.find('input.combo-value').attr('name', name);
$(target).removeAttr('name').attr('comboName', name);
}
input.attr('autocomplete', 'off');
return {
combo: span,
panel: panel
};
}
function destroy(target){
$.data(target, 'combo').panel.panel('destroy');
$.data(target, 'combo').combo.remove();
$(target).remove();
}
function bindEvents(target){
var opts = $.data(target, 'combo').options;
var combo = $.data(target, 'combo').combo;
var panel = $.data(target, 'combo').panel;
var input = combo.find('.combo-text');
var arrow = combo.find('.combo-arrow');
$(document).unbind('.combo');
combo.unbind('.combo');
panel.unbind('.combo');
input.unbind('.combo');
arrow.unbind('.combo');
if (!opts.disabled){
$(document).bind('mousedown.combo', function(e){
$('p.combo-panel').panel('close');
});
panel.bind('mousedown.combo', function(e){
return false;
});
input.bind('focus.combo', function(){
showPanel(target);
}).bind('mousedown.combo', function(e){
e.stopPropagation();
}).bind('keyup.combo', function(e){
switch(e.keyCode){
case 37: // left
case 38: // up
opts.selectPrev.call(target);
break;
case 39: // right
case 40: // down
opts.selectNext.call(target);
break;
case 13: // enter
opts.selectCurr.call(target);
break;
case 27: // esc
hidePanel(target);
break;
default:
if (opts.editable){
opts.filter.call(target, $(this).val());
}
}
return false;
});
arrow.bind('click.combo', function(){
input.focus();
}).bind('mouseenter.combo', function(){
$(this).addClass('combo-arrow-hover');
}).bind('mouseleave.combo', function(){
$(this).removeClass('combo-arrow-hover');
});
}
}
/**
* show the drop down panel.
*/
function showPanel(target){
var combo = $.data(target, 'combo').combo;
var panel = $.data(target, 'combo').panel;
if ($.fn.window){
panel.panel('panel').css('z-index', $.fn.window.defaults.zIndex++);
}
panel.panel('open');
(function(){
if (panel.is(':visible')){
var top = combo.offset().top + combo.outerHeight();
if (top + panel.outerHeight() > $(window).height() + $(document).scrollTop()){
top = combo.offset().top - panel.outerHeight();
}
if (top < $(document).scrollTop()){
top = combo.offset().top + combo.outerHeight();
}
panel.panel('move', {
left:combo.offset().left,
top:top
});
setTimeout(arguments.callee, 200);
}
})();
}
/**
* hide the drop down panel.
*/
function hidePanel(target){
var panel = $.data(target, 'combo').panel;
panel.panel('close');
}
function validate(target, doit){
if ($.fn.validatebox){
var opts = $.data(target, 'combo').options;
var input = $.data(target, 'combo').combo.find('input.combo-text');
input.validatebox(opts);
if (doit){
input.validatebox('validate');
input.trigger('mouseleave');
}
}
}
function setDisabled(target, disabled){
var opts = $.data(target, 'combo').options;
var combo = $.data(target, 'combo').combo;
if (disabled){
opts.disabled = true;
$(target).attr('disabled', true);
combo.find('.combo-value').attr('disabled', true);
combo.find('.combo-text').attr('disabled', true);
} else {
opts.disabled = false;
$(target).removeAttr('disabled');
combo.find('.combo-value').removeAttr('disabled');
combo.find('.combo-text').removeAttr('disabled');
}
}
function clear(target){
var combo = $.data(target, 'combo').combo;
combo.find('input.combo-value:gt(0)').remove();
combo.find('input.combo-value').val('');
combo.find('input.combo-text').val('');
}
function getText(target){
var combo = $.data(target, 'combo').combo;
return combo.find('input.combo-text').val();
}
function setText(target, text){
var combo = $.data(target, 'combo').combo;
combo.find('input.combo-text').val(text);
validate(target, true);
}
function getValues(target){
var values = [];
var combo = $.data(target, 'combo').combo;
combo.find('input.combo-value').each(function(){
values.push($(this).val());
});
return values;
}
function setValues(target, values){
var opts = $.data(target, 'combo').options;
var oldValues = getValues(target);
var combo = $.data(target, 'combo').combo;
combo.find('input.combo-value').remove();
var name = $(target).attr('comboName');
for(var i=0; i<values.length; i++){
var input = $('<input type="hidden" class="combo-value">').appendTo(combo);
if (name) input.attr('name', name);
input.val(values[i]);
}
var tmp = [];
for(var i=0; i<oldValues.length; i++){
tmp[i] = oldValues[i];
}
var aa = [];
for(var i=0; i<values.length; i++){
for(var j=0; j<tmp.length; j++){
if (values[i] == tmp[j]){
aa.push(values[i]);
tmp.splice(j, 1);
break;
}
}
}
if (aa.length != values.length || values.length != oldValues.length){
if (opts.multiple){
opts.onChange.call(target, values, oldValues);
} else {
opts.onChange.call(target, values[0], oldValues[0]);
}
}
}
function getValue(target){
var values = getValues(target);
return values[0];
}
function setValue(target, value){
setValues(target, [value]);
}
/**
* parse options from markup.
*/
function parseOptions(target){
var t = $(target);
return {
width: (parseInt(target.style.width) || undefined),
panelWidth: (parseInt(t.attr('panelWidth')) || undefined),
panelHeight: (t.attr('panelHeight')=='auto' ? 'auto' : parseInt(t.attr('panelHeight')) || undefined),
separator: (t.attr('separator') || undefined),
multiple: (t.attr('multiple') ? (t.attr('multiple') == 'true' || t.attr('multiple') == true) : undefined),
editable: (t.attr('editable') ? t.attr('editable') == 'true' : undefined),
disabled: (t.attr('disabled') ? true : undefined),
required: (t.attr('required') ? (t.attr('required') == 'true' || t.attr('required') == true) : undefined),
missingMessage: (t.attr('missingMessage') || undefined)
};
}
$.fn.combo = function(options, param){
if (typeof options == 'string'){
return $.fn.combo.methods[options](this, param);
}
options = options || {};
return this.each(function(){
var state = $.data(this, 'combo');
if (state){
$.extend(state.options, options);
} else {
var r = init(this);
state = $.data(this, 'combo', {
options: $.extend({}, $.fn.combo.defaults, parseOptions(this), options),
combo: r.combo,
panel: r.panel
});
$(this).removeAttr('disabled');
}
$('input.combo-text', state.combo).attr('readonly', !state.options.editable);
setDisabled(this, state.options.disabled);
setSize(this);
bindEvents(this);
validate(this);
});
};
$.fn.combo.methods = {
parseOptions: function(jq){
return parseOptions(jq[0]);
},
options: function(jq){
return $.data(jq[0], 'combo').options;
},
panel: function(jq){
return $.data(jq[0], 'combo').panel;
},
textbox: function(jq){
return $.data(jq[0], 'combo').combo.find('input.combo-text');
},
destroy: function(jq){
return jq.each(function(){
destroy(this);
});
},
resize: function(jq, width){
return jq.each(function(){
setSize(this, width);
});
},
showPanel: function(jq){
return jq.each(function(){
showPanel(this);
});
},
hidePanel: function(jq){
return jq.each(function(){
hidePanel(this);
});
},
disable: function(jq){
return jq.each(function(){
setDisabled(this, true);
bindEvents(this);
});
},
enable: function(jq){
return jq.each(function(){
setDisabled(this, false);
bindEvents(this);
});
},
clear: function(jq){
return jq.each(function(){
clear(this);
});
},
getText: function(jq){
return getText(jq[0]);
},
setText: function(jq, text){
return jq.each(function(){
setText(this, text);
});
},
getValues: function(jq){
return getValues(jq[0]);
},
setValues: function(jq, values){
return jq.each(function(){
setValues(this, values);
});
},
getValue: function(jq){
return getValue(jq[0]);
},
setValue: function(jq, value){
return jq.each(function(){
setValue(this, value);
});
}
};
$.fn.combo.defaults = {
width: 'auto',
panelWidth: null,
panelHeight: 200,
multiple: false,
separator: ',',
editable: true,
disabled: false,
required: false,
missingMessage: 'This field is required.',
selectPrev: function(){},
selectNext: function(){},
selectCurr: function(){},
filter: function(query){},
onChange: function(newValue, oldValue){}
};
})(jQuery);精简版代码
function bindEvents(target){
var opts = $.data(target, 'combo').options;
var combo = $.data(target, 'combo').combo;
var panel = $.data(target, 'combo').panel;
var input = combo.find('.combo-text');
var arrow = combo.find('.combo-arrow');
$(document).unbind('.combo');
combo.unbind('.combo');
panel.unbind('.combo');
input.unbind('.combo');
arrow.unbind('.combo');
if (!opts.disabled){
$(document).bind('mousedown.combo', function(e){
$('p.combo-panel').panel('close');
});
panel.bind('mousedown.combo', function(e){
return false;
});
input.bind('focus.combo', function(){
showPanel(target);
}).bind('mousedown.combo', function(e){
e.stopPropagation();
}).bind('keyup.combo', function(e){
switch(e.keyCode){
case 37: // left
case 38: // up
opts.selectPrev.call(target);
break;
case 39: // right
case 40: // down
opts.selectNext.call(target);
break;
case 13: // enter
opts.selectCurr.call(target);
break;
case 27: // esc
hidePanel(target);
break;
default:
if (opts.editable){
opts.filter.call(target, $(this).val());
}
}
return false;
});
arrow.bind('click.combo', function(){
input.focus();
}).bind('mouseenter.combo', function(){
$(this).addClass('combo-arrow-hover');
}).bind('mouseleave.combo', function(){
$(this).removeClass('combo-arrow-hover');
});
}
}
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