[Javascript] Why won't this work????

[Cutter (JavaScript)]

I've created a form validation script, but for some reason it keeps 
choking after it does the 8th field the second time around. Anyone???

var fieldnames = new Array();
var Item = new Array();
fieldnames[0] = (Item =['name','text','Please supply your Name',0,0]);
fieldnames[1] = (Item = ['title','text','Please supply your Title',0,0]);
fieldnames[2] = (Item = ['company','text','Please supply your Company 
name',0,0]);
fieldnames[3] = (Item = ['address','text','Please supply your 
Address',0,0]);
fieldnames[4] = (Item = ['city','text','Please supply your City',0,0]);
fieldnames[5] = (Item = ['country','select','Please supply your 
Country',0,0]);
fieldnames[6] = (Item = ['state_province','select','Please supply your 
State or province',0,0]);
fieldnames[7] = (Item = ['zip_or_country_code','text','Please supply 
your Zip or Country Code',0,0]);
fieldnames[8] = (Item = ['phone','text','Please supply your Phone 
number',1,0]);
fieldnames[9] = (Item = ['fax','text','Please supply your Fax number',1,0]);
fieldnames[10] = (Item = ['email','text','You must enter a valid Email 
address',1,1]);

function isEmpty(form, field)
{

    fn = getField(field);
    tp = getType(field);
    result = false;
   
   
    if(tp == 'text')
    {
   
        strValue = "form." + fn + ".value";
   
    }
   
    if(tp == 'select')
    {
   
        strValue = "form." + fn + ".options[form." + fn + 
".selectedIndex].value";
   
    }
   
    if ((eval(strValue) == null) || (eval(strValue) == ''))
        result = true;
       
    return result;

}

function getField(field)
{

    Item = field;
    return Item[0];

}

function getType(field)
{

    Item = field;
    return Item[1];
   
}

function getError(field)
{

    Item = field;
    return Item[2];

}

function blValChar(field)
{

    Item = field;
    return Item[3];

}

function blValMail(field)
{

    Item = field;
    return Item[4];

}

function showError(field, form)
{

    alert(getError(field));
    a = "form." + getField(field);
    eval(a).focus();
    if(getType(field) == 'text')
        eval(a).select();

}

function charCheck(field, form)
{

    result = true;
    var arrBadChars = new 
Array("~","`","!","@","#","$","%","%","^","&","*","(",")","_","=",":",";","'","<",">",".","?","/");
    strField = "form." + getField(field);
    a = eval(strField).value;
   
    for (i = 0; i < arrBadChars.length; i++)
    {
   
        if (a.indexOf(arrBadChars[i]) != '-1')
        {
           
            alert('Please do not enter any illegal characters');
            eval(strField).focus();
            eval(strField).select();
            result = false;
            return result;
           
        }
       
    }
   
    return result;

}

function chkMail(field, form)
{

    re= /^\w+([\.-]?\w)*@\w+([\.]?\w+)*(\.\w{2,4})+$/; // RegEx for 
testing email
    result = true;
    strField = "form." + getField(field);
    strValue = eval(strField).value;
   
    if(!re.test(strValue))
        result = false;
   
    return result;

}

function valForm(form)
{

    for( i = 0; i < fieldnames.length; i++ )
    {
   
        alert("Field " + i + " " + getField(fieldnames[i]));
       
        if(isEmpty(form,fieldnames[i]))
        {
       
            showError(fieldnames[i],form);
            return false;
       
        }
       
        if(blValChar(fieldnames[i]))
        {
       
            if(!charCheck(fieldnames[i], form))
                return false;
               
        }
       
        if(blValMail(fieldnames[i]))
        {
       
            if(!chkMail(fieldnames[i]))
                return false;
       
        }
       
    }
   
    return true;

}