Magento 1.8 JavaScript – Resolving Prototype JS Error

I am getting js error as follows from my magento project.MY project url is check my project.
i tried js noconflict but no use.

Error:

Uncaught TypeError: (intermediate value)(intermediate
value)(intermediate value)(intermediate value)(intermediate value) is
not a function www.bigzaar.com/:1 Uncaught ReferenceError: jQuery is
not defined www.bigzaar.com/:93 Uncaught ReferenceError: jQuery is not
defined www.bigzaar.com/:151 Uncaught ReferenceError: jQuery is not
defined www.bigzaar.com/:157 Uncaught ReferenceError: jQuery is not
defined www.bigzaar.com/:420 Uncaught ReferenceError: jQuery is not
defined jquery.mobile.customized.min.js:10 Uncaught ReferenceError:
jQuery is not defined camera.js:2238 Uncaught ReferenceError: jQuery
is not defined www.bigzaar.com/:607 Uncaught ReferenceError: jQuery is
not defined www.bigzaar.com/:704 Uncaught ReferenceError: jQuery is
not defined www.bigzaar.com/:863 Uncaught ReferenceError: jQuery is
not defined

my js file:

/********Javascript for FREE TEXT SEARCH ************/
var Quicksearch = Class.create();
var idSearchInput = '';
Quicksearch.prototype = {
    initialize: function(searchUrl,resultNotice,idSearchInput){
        this.idSearchInput = idSearchInput;
        this.searchUrl = searchUrl;     
        this.onSuccess = this.onSuccess.bindAsEventListener(this);        
        this.onFailure = this.onFailure.bindAsEventListener(this);              
        this.currentSearch = '';    
        this.resultNotice = resultNotice;
    },
    search: function(){ 
        var searchBox = $(this.idSearchInput);

        if(searchBox.value=='')
        {
            return;
        }

        if ((this.currentSearch!="") &&(searchBox.value == this.currentSearch)) {
            return;
        }
        this.currentSearch = searchBox.value;

        searchBox.className =  'loading-result input-text';
        var keyword = searchBox.value;


        url = this.searchUrl+"keyword/" + escape(keyword);

        new Ajax.Request(url, {
              method: 'get',         
              onSuccess: this.onSuccess,

              onFailure: this.onFailure 
          });    
    },
    onFailure: function(transport){
        $(this.idSearchInput).className ="input-text";
    },
    onSuccess: function(transport)
    {
        var showResults = $('showResults');
        showResults.style.display = "block";
        var listResults = $('listResults');
        listResults.style.display = "block";
        var searchBox = $(this.idSearchInput);
        if (transport && transport.responseText) {
            try{
                response = eval('(' + transport.responseText + ')');
            }
            catch (e) {
                response = {};
            }

            if (response.html != "") {
                this.currentSearch = searchBox.value;
                listResults.update(response.html);
                var searchResultNotice = this.resultNotice;
                var strNotice = searchResultNotice.replace("{{keyword}}",this.currentSearch);
                this.updateResultLabel(strNotice);
                searchBox.className = 'search-complete input-text';
            }
            else
            {
                listResults.update(response.html);
                this.updateResultLabel('No results for "<span class="keyword">'+this.currentSearch+'</span>"');
                searchBox.className ="search-complete input-text";
            }           
        }       
    },
    updateResultLabel: function(message)
    {
        $("resultLabel").update(message);
    }
}

my js calling function

<script type="text/javascript">
var quicksearch = new Quicksearch(
    '<?php echo $this->getUrl('freetextsearch/search/quicksearch') ?>',
    '<?php echo $resultNotice ?>',
    'input_search'
);
var numberChar = <?php echo Mage::getStoreConfig('freetextsearch/quick_search_setting/number_character')?>;
Event.observe('input_search', 'keyup', function(event){
    var searchBox = $('input_search');
    if(searchBox.value.length >= numberChar){
        quicksearch.search();
    }   
});
function closeDropdown() {
    var showResults = $('showResults');
    showResults.style.display = "none";
}

please help me to solve this error.any help will be appreciable