封装html的select标签的js操作实例

function BindSelect(id,dataList,fieldtext,fieldValue) { 
//绑定某一个数据源，fieldtext为需要绑定的文本字段，fieldValue为需要绑定的value字段 
var select = $("#" + id)[0]; 
for (var i = 0; i < dataList.length; i++) { 
select.options.add(new Option(eval("dataList[" + i + "]." + fieldtext), eval("dataList[" + i + "]." + fieldValue))); 
} 
} 
function BindSelectOptions(id, OptionList) { 
var select = $("#" + id)[0]; 
for (var i = 0; i < OptionList.length; i++) { 
select.options.add(new Option(OptionList[i].Text, OptionList[i].Value)); 
} 
} 
function ClearAllItems(id) {//清空所有的选项 
var select = $("#" + id)[0]; 
select.options.length = 0; 
} 
function AddOneItem(id, text, value) {//添加一个选项 
var select = $("#" + id)[0]; 
select.options.add(new Option(text, value)); 
} 
function selectOneOption(id, selectValue) {//根据值，选中一个选项 
var select = $("#" + id)[0]; 
var len = select.options.length; 
for (var i = 0; i < len; i++) { 
if (select.options[i].value == selectValue) { 
select.options[i].selected = true; 
break; 
} 
} 
} 
function selectOneOptionByIndex(id, index) {//<SPAN style="FONT-FAMILY: Arial, Helvetica, sans-serif">//根据下标，选中一个选项</SPAN> var select = $("#" + id)[0]; 
var len = select.options.length; 
if (index >= 0 && index <= len) { 
select.options[index].selected = true; 
} 
}