function emailvalidation(enteredd, alertbox) {
    // E-mail-Validation (c) Henrik Petersen / NetKontoret
    // Explained at www.netkontoret.dk/jsforms.htm
    // Please do not remove the this line and the two lines above.
    fobj = document.getElementById(enteredd);
    apos = fobj.value.indexOf("@");
    dotpos = fobj.value.lastIndexOf(".");
    lastpos = fobj.value.length - 1;
    if (apos < 1 || dotpos - apos < 2 || lastpos - dotpos > 4 || lastpos - dotpos < 2)
    {
        if (alertbox) {
            alert(alertbox);
        }
        return false;
    } else {
        return true;
    }
}

function valuevalidation(entered, min, max, alertbox, datatype)
{
    // Value-Validation (c) Henrik Petersen / NetKontoret
    // Explained at www.netkontoret.dk/jsforms.htm
    // Please do not remove the this line and the two lines above.
    with(entered)
    {
        checkvalue = parseFloat(value);
        if (datatype)
        {
            smalldatatype = datatype.toLowerCase();
            if (smalldatatype.charAt(0) == "i") {
                checkvalue = parseInt(value)
            };
        }
        if ((parseFloat(min) == min && checkvalue < min) || (parseFloat(max) == max && checkvalue > max) || value != checkvalue)
        {
            if (alertbox != "") {
                alert(alertbox);
            }
            return false;
        } else {
            return true;
        }
    }
}

function digitvalidation(entered, min, max, alertbox, datatype)
{
    // Digit-Validation (c) Henrik Petersen / NetKontoret
    // Explained at www.netkontoret.dk/jsforms.htm
    // Please do not remove the this line and the two lines above.
    with(entered) {
        checkvalue = parseFloat(value);
        if (datatype) {
            smalldatatype = datatype.toLowerCase();
            if (smalldatatype.charAt(0) == "i") {
                checkvalue = parseInt(value);
                if (value.indexOf(".") != -1) {
                    checkvalue = checkvalue + 1
                }
            };
        }
        if ((parseFloat(min) == min && value.length < min) || (parseFloat(max) == max && value.length > max) || value != checkvalue) {
            if (alertbox != "") {
                alert(alertbox);
            }
            return false;
        } else {
            return true;
        }
    }


}

function strtrim(text) {
    //Match all spaces or tabs at beginning and end of text and replace
    //with null strings
/* \s Matches a "whitespace" character. Depending on the regular expression engine, this can include carriage returns,
 line feeds, horizontal tabs and vertical tabs, as well as spaces. Note that this is case-sensitive: 
 '\S' matches non-whitespace characters
*/
    return text.replace(/^\s+/, '').replace(/\s+$/, '');
}

function emptyvalidation(entered, alertbox) {
    // Emptyfield-Validation (c) Henrik Petersen / NetKontoret
    // Explained at www.netkontoret.dk/jsforms.htm
    // Please do not remove the this line and the two lines above.
    var fobj = document.getElementById(entered);

    if (fobj.value == null || fobj.value == "" || strtrim(fobj.value) == "") {
        if (alertbox != "") {
            alert(alertbox);
        }
        return false;
    } else {
        return true;
    }
}


function emptytextareavalidation(entered, alertbox) {
    with(entered) {
        if (innerText == null || innerText == "" || strtrim(innerText) == "") {
            if (alertbox != "") {
                alert(alertbox);
            }
            return false;
        } else {
            return true;
        }
    }
}

function checkboxvalidation(entered, alertbox)
{
    with(entered)
    {
        if (checked)

        {
            return true;
        } else

        {
            if (alertbox != "") {
                alert(alertbox);
            }
            return false;
        }
    }
}

function lengthvalidation(entered, min, max, alertbox)
{
    // Digit-Validation (c) Henrik Petersen / NetKontoret
    // Explained at www.netkontoret.dk/jsforms.htm
    // Please do not remove the this line and the two lines above.
    with(entered)
    {
        if ((value.length < min) || (value.length > max))
        {
            if (alertbox != "") {
                alert(alertbox);
            }
            return false;
        } else {
            return true;
        }
    }
}

function detectbrowser()
{
    Browsername = navigator.appName;
    browser = "0";
    if (navigator.appVersion.indexOf("2.0")) {
        browser = "2"
    };
    if (navigator.appVersion.indexOf("3.0")) {
        browser = "3"
    };
    if (navigator.appVersion.indexOf("4.0")) {
        browser = "4"
    };
}

function confirmaction()
{
	confirm("Are you sure you want to proceed?", "", function(answer){
		if(answer) document.form.submit();
	});
}

function alfanumericvalidation(entered, alertbox) {
    str = entered.value;
    reg = /^([a-zA-Z0-9_\-]+)$/;
    if (!reg.test(str)) {
        alert(alertbox);
        return false;
    } else {
        return true;
    }
}

function dateformatvalidation(entered) {
    str = entered;
    //str like "yyyy-mm-dd hh:MM:ss"
    reg = /^\d{4,4}-\d{2,2}-\d{2,2} \d{2,2}:\d{2,2}:\d{2,2}$/;
    if (!reg.test(entered)) {
        alert("You have to type the right format: yyyy-mm-dd HH:MM:SS");
        return false;
    }
    reg2 = /-| |:/g;
    valori = entered.split(reg2);
    year = new Number(valori[0]);
    month = new Number(valori[1]);
    day = new Number(valori[2]);
    hour = new Number(valori[3]);
    minute = new Number(valori[4]);
    second = new Number(valori[5]);
    if (intvalidation(year, 1900, 3000, "You haven't typed a valid time of expiring (year)!") == false) return false;
    if (intvalidation(month, 1, 12, "You haven't typed a valid time of expiring (month)!") == false) return false;
    if (intvalidation(day, 1, 31, "You haven't typed a valid time of expiring (day)!") == false) return false;
    if (intvalidation(hour, 0, 23, "You haven't typed a valid time of expiring (hour)!") == false) return false;
    if (intvalidation(minute, 0, 59, "You haven't typed a valid time of expiring (minute)!") == false) return false;
    if (intvalidation(second, 0, 59, "You haven't typed a valid time of expiring (second)!") == false) return false;
    //verify if the day in month is correct (eg: February)
    data = new Date(year, month - 1); //, date, hour, minute, second) )
    data.setDate(day);
    if (month != data.getMonth() + 1) {
        alert("You haven't typed the a valid time of expiring (day)!");
        return false;
    }
    return true;
}

function intvalidation(number, minval, maxval, errormessage) {
    if (number < minval || number > maxval) {
        alert(errormessage);
        return false;
    };
    return true;
}


function getRadioValue(radio) {
    if (typeof(radio) == "undefined" || radio == null) return null;
    if (radio.length >= 1) {
        for (index = 0; index < radio.length; index++) {
            if (radio[index].checked) return radio[index].value;
        }
        return null;
    } else {
        if (radio.checked) return radio.value;
        return null;
    }
}