function trim(str)

{

    return str.replace(/^\s+/,"").replace(/\s+$/,"");

}



function checkemail(fld,emptyok,alrt)

{

    var s_email = trim(fld.value);



    if (emptyok && s_email.length==0)

    {

        return true;

    }

    return checkemailvalue(s_email,alrt);

}



function checkemailvalue(s_email,alrt)

{



    if ((s_email.length < 6) ||

       (s_email.indexOf('@',0) < 1) ||

       (s_email.lastIndexOf('@') != s_email.indexOf('@',0)) ||

       (s_email.lastIndexOf('@') > (s_email.length - 5)) ||

       (s_email.lastIndexOf('.') > (s_email.length - 3)) ||

       (s_email.lastIndexOf('.') < (s_email.length - 5)) ||

       (s_email.indexOf('..',0) > -1) ||

       (s_email.indexOf('@.',0) > -1))

    {

        if (alrt) alert('Please enter a valid e-mail address.');

        return false;

    }



	if ((s_email.indexOf(' ',0) > -1)  ||

		(s_email.indexOf(',',0) > -1)  ||

		(s_email.indexOf('"',0) > -1)  ||

		(s_email.indexOf('\'',0) > -1) ||

		(s_email.indexOf(':',0) > -1)  ||

		(s_email.indexOf('>',0) > -1)  ||

		(s_email.indexOf('<',0) > -1))

	{

		if (alrt)

		{

            alert('Please enter a valid e-mail address. E-mail addresses with apostrophes, quotation marks, commas, colons, spaces, or greater than or less than signs are not acceptable.');

		}

		return false;

	}

    

    if ((s_email.indexOf('.@',0) > -1)) {

        if (alrt) {

            alert('Please proofread this email address: '+s_email+' .  It may contain an error.');

        }

    }

    return true;

}



function validate_textarea(field, maxlen, doalert, mandatory) 

{



    if (field.value == null || field.value.length == 0) {

        if (mandatory == true) {

            if (doalert) alert("Field must contain a value.");

            field.focus();

            field.select();

            window.isvalid = false;

            return false;

        }

        window.isvalid = true;

        return true;

    }



    var validflag = true;

    var err = '';

    if (field.value.length > maxlen) {

        err = "Text too long (truncated at "+maxlen+" characters)";

        newval = field.value.substr(0,maxlen);

        field.truncatedValue = true;

    } else

        field.truncatedValue = false;

    if (err != '') {

        if (doalert) alert(err);

        field.value = newval;

        validflag = false;

    }

    window.isvalid = validflag;

    return validflag;

}



function validate_field(field, type, doalert, mandatory)

{

    type = type.toLowerCase();

    if (field.value == null || field.value.length == 0) {

        if (mandatory == true) {

            if (doalert) alert("Field must contain a value.");

            field.focus();

            field.select();

            window.isvalid = false;

            return false;

        } else {

            window.isvalid = true;

            return true;

        }

    }

    var validflag = true;



    if (type == "email") {

        if (checkemail(field, false, doalert))

            validflag = true;

        else

            validflag = false;

    } else if (type == "phone") {

        var val = field.value;



        if (val.length != 0 && val.length<10) {

            if (doalert) alert("Please enter a full telephone number including the area code.");

            validflag = false;

        }



        if (validflag) {

            var re = /^[0-9]+$/;

            if (re.test(val)) {

                if (val.length == 10)

                    field.value = "("+val.substring(0,3)+") "+val.substring(3,6)+"-"+val.substring(6);

            }

        }

    }



    if (!validflag) {

        field.focus();

        field.select();

    }

    window.isvalid = validflag;

    return validflag;

}



function checkMandatoryFields(fields,labels)

{

    var result = "";

    for (i=0; i < fields.length; i++) {

        if (fields[i] == null) continue;

        if (fields[i].type == "select-one") {

            var field = (fields[i].selectedIndex == -1 ? 

                    "" : fields[i].options[fields[i].selectedIndex]);

            var val = (field == null ? "" : field.value);

            if (val == null || val.length == 0 || val == -1)

                result += (result.length ? "," : "") + labels[i];

        } else if (fields[i].value.indexOf(String.fromCharCode(3)) != -1) {



            var nvarray = fields[i].value.split(String.fromCharCode(4));

            for (j=0; j < nvarray.length; j++) {

                var nv = nvarray[j].split(String.fromCharCode(3));

                if (nv[1] == 'T' && nv[3].length == 0)

                    result += (result.length ? "," : "") + nv[2];

            }

        } else {

            if ( isempty(fields[i]) )

                result += (result.length ? "," : "") + labels[i];

        }

    }

    return result;

}



function isempty(fld1,nam)

{

    var val = fld1.value;

    return isValEmpty(val,nam);

}



function isValEmpty(val,nam)

{

    if (val == null)

        return true;



    if (val.length == 0)

        return true;

    re = / /gi;

    val = val.replace(re,'');

    return (val.length == 0)

}