JS
window.onload = function(){
var _inOption = document.getElementById("inOption"),
_inIpnut = document.getElementById("inInput"),
addOptions = function(target, optons){//添加option
var _option = null,
ol = optons.length,
i = 0,
_v = "",
_t = "";
for(; i < ol ; i++ ){
_v = optons[i].value;
_t = optons[i].text;
_option = document.createElement("OPTION");//创建空option
_option.value = _v;
_option.text = _t;
target.options.add(_option);
}
};
_inIpnut.onkeyup = function(){
var key=event.keyCode,
_v = _inIpnut.value;
if(key == 13){//如果为回车键，则添加值
addOptions(_inOption, [//添加新option
{
"value":_v,
"text":_v
}
])
}
}
_inOption.onchange = function(){//值变更事件
_inIpnut.value = this.value;
}
};