function PopUp(url, name, height, width)
{
	newwindow=window.open(url, name, "status=1,height=" + height + ",width=" + width + ",resizable=1, scrollbars=1");
	if (window.focus) {newwindow.focus()}
	return false;
}

function Tab(currentField, nextField)
{
    // Determine if the current field's max length has been reached.
    if (currentField.value.length == currentField.maxLength)
    {
        // Retreive the next field in the tab sequence, and give it the focus.
        document.getElementById(nextField).focus();
    }
}

var isNN = (navigator.appName.indexOf("Netscape")!=-1);

function autoTab(input,len, e) 
{
    var keyCode = (isNN) ? e.which : e.keyCode; 
    var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
    if(input.value.length >= len && !containsElement(filter,keyCode)) {
    input.value = input.value.slice(0, len);
    input.form[(getIndex(input)+1) % input.form.length].focus();
}

function containsElement(arr, ele) 
{
    var found = false, index = 0;
    while(!found && index < arr.length)
    if(arr[index] == ele)
    found = true;
    else
    index++;
    return found;
}

function getIndex(input) 
{
    var index = -1, i = 0, found = false;
    while (i < input.form.length && index == -1)
    if (input.form[i] == input)
        index = i;
    else i++;
        return index;
    }
    return true;
}