如图所示点击表单会出现一个弹出层，弹出层内容可以用键盘的上下左右键位控制，我自己写的代码有问题，不管点击键盘的向上键还是向下键都会返回第一个，而不是依次的关系。我用的插件是基于jq的easyui我写的代码如下 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){
$('div.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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