Image resizing without white spacing in magento products grid or category page

<?php echo $this->helper('catalog/image')->init($_product, 'image')

->constrainOnly(TRUE)

->keepAspectRatio(TRUE)

->keepFrame(FALSE)

->resize(400,400)

How do I change the default text “Search entire store here” in the Search box?

app>design>frontend>default>default>template>catalogsearch>form.mini.phtml

//<![CDATA[
            var searchForm = new Varien.searchForm('search_mini_form', 'search', '<?php echo $this->__('Search entire store here...') ?>');
            searchForm.initAutocomplete('<?php echo $this->helper('catalogsearch')->getSuggestUrl() ?>', 'search_autocomplete');
        //]]>

Magento add css file from admin cms page layout

<reference name="head">
  <action method="addItem">
    <type>skin_js</type><script>yourfile.js</script>
  </action>
</reference>