function commitCheck() {
    var strAsker = document.getElementById("txb_asker").value;
    var strTelephone = document.getElementById("txb_telephone").value;
    var strEmail = document.getElementById("txb_email").value;
    var strContent = document.getElementById("txb_content").value;
    var strType = document.getElementById("ddl_type").value
    if ( strType.trim() == "" || strAsker.trim() == "" || strContent.trim() == "" || strEmail.trim() == "" || strTelephone.trim() == "") {
        alert("带*项的不能为空！")
        return false;
    }
    
    if (strContent.length > 250) {
        alert("建议内容字数不能大于250个！")
        return false;
    }

    return true;
}