function echeck(str) {
    var at = "@"
    var dot = "."
    var lat = str.indexOf(at)
    var lstr = str.length
    var ldot = str.indexOf(dot)
    if (str.indexOf(at) == -1) {
        alert('Invalid E-mail ID.')
        return false
    }

    if (str.indexOf(at) == -1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) {
        alert('Invalid E-mail ID.')
        return false
    }

    if (str.indexOf(dot) == -1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) {
        alert('Invalid E-mail ID.')
        return false
    }

    if (str.indexOf(at, (lat + 1)) != -1) {
        alert('Invalid E-mail ID.')
        return false
    }

    if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) {
        alert('Invalid E-mail ID.')
        return false
    }

    if (str.indexOf(dot, (lat + 2)) == -1) {
        alert('Invalid E-mail ID.')
        return false
    }

    if (str.indexOf(" ") != -1) {
        alert('Invalid E-mail ID.')
        return false
    }
    return true

}

//check user id existence



function chkIdExistence() {
    var userid = document.getElementById("usernameId").value;
    //alert(userid);
    var returnval = true;
    if (userid.length > 7 && chkForSpecialChar(userid)) {
        document.getElementById('usermsgdiv').style.display = 'none';
        if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp = new XMLHttpRequest();
        }
        else {// code for IE6, IE5
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        xmlhttp.onreadystatechange = function() {
            if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                document.getElementById('msgdiv').style.display = "block";
                document.getElementById('msgspn').style.fontWeight = "bold";
                document.getElementById('msgspn').style.fontSize = "medium";
                if (xmlhttp.responseText == "1") {
                    document.getElementById('msgspn').style.color = "green";
                    document.getElementById('msgspn').innerHTML = 'User Id Available'; //"User id is available";
                }
                else {
                    document.getElementById('msgspn').style.color = "red";
                    document.getElementById('msgspn').innerHTML = 'User Id Unavailable'; //"User id is not available";
                    document.getElementById("usernameId").focus();
                    returnval = false;
                }
            }
        }
        xmlhttp.open("GET", "/control/ajax_check_userid.asp?value=" + userid, false);
        xmlhttp.send();
    }
    if (userid.length > 7 && chkForSpecialChar(userid))
        document.getElementById("msgdiv").style.display = 'block';
    else
        document.getElementById("msgdiv").style.display = 'none';
    return true;
}

 function chkForSpecialChar(val) {
       
        var f = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        var b = document.getElementById("usernameId").value; var e = true; var a = 0; var c = "";
        for (i = 0; i < b.length; i++) {
            ch = b.charAt(i); for (j = 0; j < f.length; j++) {
                if (ch == f.charAt(j)) { break }
            } if (j == f.length) { e = false; break }
            if (ch != ",") { c += ch }
        }
        return e;
    }
function resetform() {
    document.forms.reset();
}

function validationOnSignUpForm() {
    if (document.getElementById('usernameId').value == "") {
        alert('User Id is required.');
        document.getElementById('usernameId').focus();
        return false;
    }
    if (document.getElementById('usernameId').value.length < 8) {
        alert('User Id must have at least 8 character.');
        document.getElementById('usernameId').focus();
        return (false);
    }

    var checkOK = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    var checkStr = document.getElementById('usernameId').value;
    var allValid = true;
    var decPoints = 0;
    var allNum = "";
    for (i = 0; i < checkStr.length; i++) {
        ch = checkStr.charAt(i);
        for (j = 0; j < checkOK.length; j++)
            if (ch == checkOK.charAt(j))
            break;
        if (j == checkOK.length) {
            allValid = false;
            break;
        }
        if (ch != ",")
            allNum += ch;
    }
    if (!allValid) {
        alert('Please enter only digit & alphabat characters in the UseId field.');
        document.getElementById('usernameId').focus();
        return (false);
    }

    if (document.getElementById('userpassword').value == "") {
        alert('Password is required.');
        document.getElementById('userpassword').focus();
        return false;
    }

    if (document.getElementById('confirmpassword').value == "") {
        alert('Confirm Password is required.');
        document.getElementById('confirmpassword').focus();
        return false;
    }

    if (document.getElementById('userpassword').value != document.getElementById('confirmpassword').value) {
        alert('Both Password fields must be same.');
        document.getElementById('confirmpassword').value = "";
        document.getElementById('confirmpassword').focus();
        return (false);
    }

    if (document.getElementById('userfullname').value == "") {
        alert('Please enter a value for the name field.');
        document.getElementById('userfullname').focus();
        return false;
    }

    if (document.getElementById('useremailid').value == "") {
        alert('Please enter a value for the E-mail ID field.');
        document.getElementById('useremailid').focus();
        return false;
    }

    if (echeck(document.getElementById('useremailid').value) == false) {
        document.getElementById('useremailid').focus();
        return (false);
    }

    if (document.getElementById('usermobnumber').value == "") {
        alert('Please enter a value for the Mobile Number field.');
        document.getElementById('usermobnumber').focus();
        return false;
    }

    if (document.getElementById('usermobnumber').value != "") {
        if (isNaN(document.getElementById('usermobnumber').value) || document.getElementById('usermobnumber').value.length != 10) {
            alert('Please enter correct Mobile No.');
            document.getElementById('usermobnumber').focus();
            return false;
        }
    }
    return true;
}

function resetform() {
    document.forms.reset();
}