html：使用select选择框

js代码：

注意：初始化函数最好使用window.onload方法

var LODOP;

//获取打印机设备数，用于进行遍历

var count = LODOP.GET_PRINTER_COUNT();

window.οnlοad=function print() {

for (var i = 0; i < count; i++) {

//根据设备序号获取设备名

var msg = LODOP.GET_PRINTER_NAME(i);

//将设备名添加到select块，并添加相应value值

$("#status").append("" + msg + "");

// alert(LODOP.GET_PRINTER_NAME(1));

}

}

以下是设置默认设备的功能，原理是将设备序号存在cookie中，浏览器每次打开自动获取cookie，自动选择打印机：

//这里是写cookie逻辑

var arrStr = document.cookie.split("; ");

for (var i = 0; i < arrStr.length; i++) {

var temp = arrStr[i].split("=");

if (temp[0] == "printn" && unescape(temp[1]) != "") {

//判断cookie中是否存在打印机的值

var tempvalue = unescape(temp[1]);

LODOP.SET_PRINTER_INDEX(unescape(temp[1]));

var strPName = LODOP.GET_PRINTER_NAME(unescape(temp[1]));

console.log("当前设备：" + strPName);

}

else {

var obj = document.getElementById("status");

var index = obj.selectedIndex;

var text = obj.options[index].text;

var value = obj.options[index].value;

if (value != "") {

LODOP.SET_PRINTER_INDEX(value);

var Days = 300;

var exp = new Date();

//设置cookie过期时间

exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);

document.cookie = "printn=" + value + ";expires=" + exp.toGMTString();

}

}

//这里是读cookie自动选择设备逻辑：

var arrStr = document.cookie.split("; ");

for (var i = 0; i < arrStr.length; i++) {

var temp = arrStr[i].split("=");

if (temp[0] == "printn" && unescape(temp[1]) != "") {

LODOP.SET_PRINTER_INDEX(unescape(temp[1]));

var strPName = LODOP.GET_PRINTER_NAME(unescape(temp[1]));

document.getElementById("select").innerText = strPName;

}

}