i have this page where the datepicker which i pulled from another site(legally) where it functions perfectly. on my site when i chose a date in the dropdown menu it links back to my index page

here is the page -thanks in advance!

www.phil
ipduse
l.com/bal.html

the code for the datepicker is

/*
* DatePicker
* @author Rick Hopkins
* @modified by Micah Nolte and Martin Va?ina
* @version 0.3.2
* @classDescription A date picker object. Created with the help of MooTools v1.11
* MIT-style License.

-- start it up by doing this in your domready:

$$('input.DatePicker').each( function(el){
new DatePicker(el);
});

*/

var DatePicker = new Class({

/* set and create the date picker text box */
initialize: function(dp){

// Options defaults
this.dayChars = 1; // number of characters in day names abbreviation
this.dayNames = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
this.daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
this.format = 'mm/dd/yyyy';
this.monthNames = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
this.startDay = 7; // 1 = week starts on Monday, 7 = week starts on Sunday
this.yearOrder = 'asc';
this.yearRange = 20;
this.yearStart = 1999; //(new Date().getFullYear());


// Finds the entered date, or uses the current date
if(dp.value != '') {
dp.then = new Date(dp.value);
dp.today = new Date();
} else {
dp.then = dp.today = new Date();
}
// Set beginning time and today, remember the original
dp.oldYear = dp.year = dp.then.getFullYear();
dp.oldMonth = dp.month = dp.then.getMonth();
dp.oldDay = dp.then.getDate();
dp.nowYear = dp.today.getFullYear();
dp.nowMonth = dp.today.getMonth();
dp.nowDay = dp.today.getDate();

// Pull the rest of the options from the alt attr
if(dp.alt) {
options = Json.evaluate(dp.alt);
} else {
options = [];
}
dp.options = {
monthNames: (options.monthNames && options.monthNames.length == 12 ? options.monthNames : this.monthNames) || this.monthNames,
daysInMonth: (options.daysInMonth && options.daysInMonth.length == 12 ? options.daysInMonth : this.daysInMonth) || this.daysInMonth,
dayNames: (options.dayNames && options.dayNames.length == 7 ? options.dayNames : this.dayNames) || this.dayNames,
startDay : options.startDay || this.startDay,
dayChars : options.dayChars || this.dayChars,
format: options.format || this.format,
yearStart: options.yearStart || this.yearStart,
yearRange: options.yearRange || this.yearRange,
yearOrder: options.yearOrder || this.yearOrder
};
dp.setProperties({'id':dp.getProperty('name'), 'readonly':true});
dp.container = false;
dp.calendar = false;
dp.interval = null;
dp.active = false;
dp.onclick = dp.onfocus = this.create.pass(dp, this);
},

/* create the calendar */
create: function(dp){
if (dp.calendar) return false;

// Hide select boxes while calendar is up
if(window.ie6){
$$('select').addClass('dp_hide');
}

/* create the outer container */
dp.container = new Element('div', {'class':'dp_container'}).injectBefore(dp);

/* create timers */
dp.container.onmouseover = dp.onmouseover = function(){
$clear(dp.interval);
};
dp.container.onmouseout = dp.onmouseout = function(){
dp.interval = setInterval(function(){
if (!dp.active) this.remove(dp);
}.bind(this), 500);
}.bind(this);

/* create the calendar */
dp.calendar = new Element('div', {'class':'dp_cal'}).injectInside(dp.container);

/* create the date object */
var date = new Date();

/* create the date object */
if (dp.month && dp.year) {
date.setFullYear(dp.year, dp.month, 1);
} else {
dp.month = date.getMonth();
dp.year = date.getFullYear();
date.setDate(1);
}
dp.year % 4 == 0 ? dp.options.daysInMonth[1] = 29 : dp.options.daysInMonth[1] = 28;

/* set the day to first of the month */
var firstDay = (1-(7+date.getDay()-dp.options.startDay)%7);



/* create the month select box */
monthSel = new Element('select', {'id':dp.id + '_monthSelect'});
for (var m = 0; m < dp.options.monthNames.length; m++){
monthSel.options[m] = new Option(dp.options.monthNames[m], m);
if (dp.month == m) monthSel.options[m].selected = true;
}

/* create the year select box */
yearSel = new Element('select', {'id':dp.id + '_yearSelect'});
i = 0;
dp.options.yearStart ? dp.options.yearStart : dp.options.yearStart = date.getFullYear();
if (dp.options.yearOrder == 'desc'){
for (var y = dp.options.yearStart; y > (dp.options.yearStart - dp.options.yearRange - 1); y--){
yearSel.options[i] = new Option(y, y);
if (dp.year == y) yearSel.options[i].selected = true;
i++;
}
} else {
for (var y = dp.options.yearStart; y < (dp.options.yearStart + dp.options.yearRange + 1); y++){
yearSel.options[i] = new Option(y, y);
if (dp.year == y) yearSel.options[i].selected = true;
i++;
}
}

/* start creating calendar */
calTable = new Element('table');
calTableThead = new Element('thead');
calSelRow = new Element('tr');
calSelCell = new Element('th', {'colspan':'7'});
monthSel.injectInside(calSelCell);
yearSel.injectInside(calSelCell);
calSelCell.injectInside(calSelRow);
calSelRow.injectInside(calTableThead);
calTableTbody = new Element('tbody');

/* create day names */
calDayNameRow = new Element('tr');
for (var i = 0; i < dp.options.dayNames.length; i++) {
calDayNameCell = new Element('th');
calDayNameCell.appendText(dp.options.dayNames[(dp.options.startDay+i)%7].substr(0, dp.options.dayChars));
calDayNameCell.injectInside(calDayNameRow);
}
calDayNameRow.injectInside(calTableTbody);

/* create the day cells */
while (firstDay <= dp.options.daysInMonth[dp.month]){
calDayRow = new Element('tr');
for (i = 0; i < 7; i++){
if ((firstDay <= dp.options.daysInMonth[dp.month]) && (firstDay > 0)){
calDayCell = new Element('td', {'class':dp.id + '_calDay', 'axis':dp.year + '|' + (parseInt(dp.month) + 1) + '|' + firstDay}).appendText(firstDay).injectInside(calDayRow);
} else {
calDayCell = new Element('td', {'class':'dp_empty'}).appendText(' ').injectInside(calDayRow);
}
// Show the previous day
if ( (firstDay == dp.oldDay) && (dp.month == dp.oldMonth ) && (dp.year == dp.oldYear) ) {
calDayCell.addClass('dp_selected');
}
// Show today
if ( (firstDay == dp.nowDay) && (dp.month == dp.nowMonth ) && (dp.year == dp.nowYear) ) {
calDayCell.addClass('dp_today');
}
firstDay++;
}
calDayRow.injectInside(calTableTbody);
}

/* table into the calendar div */
calTableThead.injectInside(calTable);
calTableTbody.injectInside(calTable);
calTable.injectInside(dp.calendar);

/* set the onmouseover events for all calendar days */
$$('td.' + dp.id + '_calDay').each(function(el){
el.onmouseover = function(){
el.addClass('dp_roll');
}.bind(this);
}.bind(this));

/* set the onmouseout events for all calendar days */
$$('td.' + dp.id + '_calDay').each(function(el){
el.onmouseout = function(){
el.removeClass('dp_roll');
}.bind(this);
}.bind(this));

/* set the onclick events for all calendar days */
$$('td.' + dp.id + '_calDay').each(function(el){
el.onclick = function(){
ds = el.axis.split('|');
dp.value = this.formatValue(dp, ds[0], ds[1], ds[2]);
this.remove(dp);
}.bind(this);
}.bind(this));

/* set the onchange event for the month & year select boxes */
monthSel.onfocus = function(){ dp.active = true; };
monthSel.onchange = function(){
dp.month = monthSel.value;
dp.year = yearSel.value;
this.remove(dp);
this.create(dp);
}.bind(this);

yearSel.onfocus = function(){ dp.active = true; };
yearSel.onchange = function(){
dp.month = monthSel.value;
dp.year = yearSel.value;
this.remove(dp);
this.create(dp);
}.bind(this);
},

/* Format the returning date value according to the selected formation */
formatValue: function(dp, year, month, day){
/* setup the date string variable */
var dateStr = '';

/* check the length of day */
if (day < 10) day = '0' + day;
if (month < 10) month = '0' + month;

/* check the format & replace parts // thanks O'Rey */
dateStr = dp.options.format.replace( /dd/i, day ).replace( /mm/i, month ).replace( /yyyy/i, year );
dp.month = dp.oldMonth = '' + (month - 1) + '';
dp.year = dp.oldYear = year;
dp.oldDay = day;

/* return the date string value */
return dateStr;
},

/* Remove the calendar from the page */
remove: function(dp){
$clear(dp.interval);
dp.active = false;
if (window.opera) dp.container.empty();
else if (dp.container) dp.container.remove();
dp.calendar = false;
dp.container = false;
$$('select.dp_hide').removeClass('dp_hide');
}
});