AJAX does not work with "blanko" theme in Magento

To solve the issue concerning Improved Layered Navigation extension, please follow the steps:

1) Open file app/design/frontend/default/blanco/template/page/html/head.phtml
and remove lines
<script type="text/javascript">
        jQuery(document).ready(function (){
            jQuery('.toolbar').jqTransform({imgPath:'<?php echo $this->getSkinUrl('images/jqforms/'); ?>'});
            jQuery('.limiter').jqTransform({imgPath:'<?php echo $this->getSkinUrl('images/jqforms/'); ?>'});
        }); 
</script>

2) Copy function (in this file)
function themeOptions ($themeOption) {
    switch ($themeOption) {

.....
.....
.....
      }
}

and wrap it as below:
if (!function_exists('themeOptions') ){

function themeOptions ($themeOption) {
    switch ($themeOption) {

      .....
      .....
      .....
      }
}
}

add paste at the top of the files
app/design/frontend/default/blanco/template/catalog/layer/view.phtml
app/design/frontend/default/blanco/template/catalog/product/list.phtml