清空子元素
$(\'#region\').empty();
添加子元素
var regions = document.getElementById(\'region\'); regions.appendChild(document.createElement(\'option\'))
遍历添加子元素
var regions = document.getElementById(\'region\'); regions.appendChild(document.createElement(\'option\')) for(i=0;i<data.length;i++){ var option = document.createElement(\'option\'); option.value = data[i]; option.text = data[i]; regions.appendChild(option); }