JavaScript - Getting Blank Page When Using Php And Jquery Together.

{if not empty($campaign)}
<div class="securti-adv biggerlink">
	{if not empty ($campaign.media)}
		<a href="{$campaign.url}" {if n($campaign.linkTarget)}target="{$campaign.linkTarget}"{/if} class="thumb">
			<img src="{$campaign.image}" title="{$campaign.title1 + $campaign.title2}" alt="{$campaign.title1 + $campaign.title2}" />	</a>
	{/if}
	<div class="details">
		{if not empty ($campaign.title1) || not empty ($campaign.sub_title)}
			<a href="{$campaign.url}" {if not empty($campaign.linkTarget)}target="{$campaign.linkTarget}"{/if} title="{$campaign.title1 + $campaign.title2}">
				 {text2image styleSlug=$campaign.titleStyle1 text=$campaign.title1}
				 {text2image styleSlug=$campaign.titleStyle2 text=$campaign.title2}
				 <span><img src="{$imagesDir}/btn-campaign-meet-security-advisor.png" alt="" title="" /></span>
			</a>
			<p> {text2image styleSlug=$campaign.subtitleStyle text=$campaign.subTitle}</p>
		{/if}
	</div>
</div>

<script type="text/javascript" language="javascript">
{literal}
$(document).ready(function(){
	$('.biggerlink').biggerlink();
});
{/literal}
</script>
{/if}

(function($) {
	$.fn.biggerlink = function(options) {

		// Default settings
		var settings = {
			hoverclass:'hover', // class added to parent element on hover
			clickableclass:'hot', // class added to parent element with behaviour
			follow: true	// follow link? Set to false for js popups
			
		};
		if(options) {
			$.extend(settings, options);
		}
		$(this).filter(function(){
			 return $('a',this).length > 0;

		}).addClass(settings.clickableclass).each(function(i){

			// Add title of first link with title to parent
			$(this).attr('title', $('a[title]:first',this).attr('title'));

			// hover and trigger contained anchor event on click
			$(this)
			.mouseover(function(){
				window.status = $('a:first',this).attr('href');
				$(this).addClass(settings.hoverclass);
			})
			.mouseout(function(){
				window.status = '';
				$(this).removeClass(settings.hoverclass);
			})
			.bind('click',function(){
				$(this).find('a:first').trigger('click');
			})

			// triggerable events on anchor itself

			.find('a').bind('focus',function(){
				$(this).parents('.'+ settings.clickableclass).addClass(settings.hoverclass);
			}).bind('blur',function(){
				$(this).parents('.'+ settings.clickableclass).removeClass(settings.hoverclass);
			}).end()

			.find('a:first').bind('click',function(e){
				if(settings.follow == true)
				{
					window.location = this.href;
				}
				e.stopPropagation(); // stop event bubbling to parent
			}).end()

			.find('a',this).not(':first').bind('click',function(){
				$(this).parents('.'+ settings.clickableclass).find('a:first').trigger('click');
				return false;
			});
		});
		return this;
	};
})(jQuery);

function pdfWindow(loc)
{
  if(loc == "#RefQuide") {
     location.href = loc;
  } else {
     // The window attributes
     var window_attribs = "height=650,width=850,resizable=yes,scrollbars=yes";

     window.open(loc,"PDF",window_attribs);
  }
}

<form name="myForm">
<select name="hypercomList">
<option value="/CWRWeb/pdf/HypercomT4000.pdf">Hypercom T4000 </option>
<option value="/CWRWeb/pdf/HypercomT4100.pdf">Hypercom T4100 </option>					
</select>
<input type="button" value="Go!" onclick="pdfWindow(myForm.hypercomList.options[myForm.hypercomList.selectedIndex].value)">
				
</form>

function datecheckFunction(){
	var datecheckRequest;  // The variable that makes Ajax possible!
	
	try{
		// Opera 8.0+, Firefox, Safari
		datecheckRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			datecheckRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				datecheckRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	datecheckRequest.onreadystatechange = function(){
		if(datecheckRequest.readyState == 4){
			var ajaxDisplay = document.getElementById('ajaxDiv');
			ajaxDisplay.innerHTML = datecheckRequest.responseText;
		}
	}
	var datepicker = document.getElementById('datepicker').value;
	
	var queryString = "?datepicker=" + datepicker;
	//Add the following line
	datecheckRequest.open("GET", "http://www.affordableappliancerepairs.co.uk/admin/checkdate.php" + queryString, true);
	datecheckRequest.send(null);
}

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="/includes/jquery.nivo.slider.pack.js"></script>
<script type="text/javascript" src="/includes/jquery.ad-gallery.js"></script>
<script type="text/javascript">
    $(function() {
    $('img.image1').data('ad-desc', 'Whoa! This description is set through elm.data("ad-desc") instead of using the longdesc attribute.<br>And it contains <strong>H</strong>ow <strong>T</strong>o <strong>M</strong>eet <strong>L</strong>adies... <em>What?</em> That aint what HTML stands for? Man...');
    $('img.image1').data('ad-title', 'Title through $.data');
    $('img.image4').data('ad-desc', 'This image is wider than the wrapper, so it has been scaled down');
    $('img.image5').data('ad-desc', 'This image is higher than the wrapper, so it has been scaled down');
    var galleries = $('.ad-gallery').adGallery();
    $('#switch-effect').change(
      function() {
        galleries[0].settings.effect = $(this).val();
        return false;
      }
    );
    $('#toggle-slideshow').click(
      function() {
        galleries[0].slideshow.toggle();
        return false;
      }
    );
    $('#toggle-description').click(
      function() {
        if(!galleries[0].settings.description_wrapper) {
          galleries[0].settings.description_wrapper = $('#descriptions');
        } else {
          galleries[0].settings.description_wrapper = false;
        }
        return false;
      }
    );
  });

jQuery.noConflict();
jQuery(window).load(function() {
jQuery('#slider').nivoSlider({
    effect:'fade', // Specify sets like: 'fold,fade,sliceDown'
    animSpeed:5, // Slide transition speed
    pauseTime:7000, // How long each slide will show
    startSlide:0, // Set starting Slide (0 index)
    directionNav:false, // Next & Prev navigation
    directionNavHide:true, // Only show on hover
    controlNav:true, // 1,2,3... navigation
    controlNavThumbs:false, // Use thumbnails for Control Nav
    controlNavThumbsFromRel:false, // Use image rel for thumbs
    controlNavThumbsSearch: '.png', // Replace this with...
    controlNavThumbsReplace: '_thumb.jpg', // ...this in thumb Image src
    keyboardNav:true, // Use left & right arrows
    pauseOnHover:true, // Stop animation while hovering
    manualAdvance:false, // Force manual transitions
    captionOpacity:0.8, // Universal caption opacity
    prevText: 'Prev', // Prev directionNav text
    nextText: 'Next', // Next directionNav text
    beforeChange: function(){}, // Triggers before a slide transition
    afterChange: function(){}, // Triggers after a slide transition
    slideshowEnd: function(){}, // Triggers after all slides have been shown
    lastSlide: function(){}, // Triggers when last slide is shown
    afterLoad: function(){} // Triggers when slider has loaded
    });
});
</script>

<script type="text/javascript">
jQuery.ajax({url: 'http://www.livecounter.dk/viewstats/30050',type: 'get',success: function(ajax) {
var x = jQuery('#box4 .first:last', ajax).innerHTML;
document.write(x);
}
}
});
</script>

<script src="http://code.jquery.com/jquery-1.6.1.min.js"> </script>