下拉菜单

onload = function () {
　　var city = document.getElementById("se"); 　　for (var i = 0; i < city.length; i++) { 　　　　var zhi = document.getElementById('txt').value; 　　　　if(zhi==city.options[i].innerText){ 　　　　city.options[i].setAttribute('selected', 'selected'); 　　　　} 　　} };

function set_lan(element) {
    var txtContent = $('#txtLanguage').val();

    if ($(element).hasClass("codetag-bg")) {
        $(element).removeClass("codetag-bg");
        var value = $(element).text() + ',';
        var str = $('#txtLanguage').val()
        $('#txtLanguage').val(str.replace(value, ''));
    }
    else {
        var count = ($('#txtLanguage').val().split(',')).length - 1;
        if (count < 5) {
            $(element).addClass("codetag-bg");
            var value = $(element).text();
            document.getElementById('txtLanguage').value = txtContent + value + ', ';
        } else {
            alert('只能选5项哦亲~~~');
        }
    }
}