function refreshcode(img) {
    var d = new Date();
    var radomparam = d.getYear() + d.getMonth() + d.getDay() + d.getHours() + d.getMinutes() + d.getSeconds() + d.getMilliseconds();
    document.getElementById("checkCodeImg").src = "https://passport.21mmo.com/checkcode.clientinfo?tmp=" + radomparam;
}


function stringtrim(inputString) {

    if (typeof inputString != "string") { return inputString; }
    var retValue = inputString;
    var ch = retValue.substring(0, 1);
    while (ch == " ") {
        //检查字符串开始部分的空格
        retValue = retValue.substring(1, retValue.length);
        ch = retValue.substring(0, 1);
    }
    ch = retValue.substring(retValue.length - 1, retValue.length);
    while (ch == " ") {
        //检查字符串结束部分的空格
        retValue = retValue.substring(0, retValue.length - 1);
        ch = retValue.substring(retValue.length - 1, retValue.length);
    }
    while (retValue.indexOf("  ") != -1) {
        //将文字中间多个相连的空格变为一个空格
        retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ") + 1, retValue.length);
    }
    return retValue;
}

function writealert(object_id, alertmessage) {
    alert(alertmessage);
    document.getElementById(object_id).focus();

}