function ajax_image_change(){
 var myAjax2 = new Ajax.Updater('ajax_image_div', 'ajax.changeimage.php', {method: 'post', parameters: 'colour='+escape($F('scid')) + '&product_id='+escape($F('productid')) });
}

function highlight_tab( tabName) {

 document.getElementById('tab_back1').style.background = "url(images/ps_new_2010/product_page/tab_grey.gif)";
 document.getElementById('tab_back1').style.color = "#343434";
 document.getElementById('tab_back2').style.background = "url(images/ps_new_2010/product_page/tab_grey.gif)";
 document.getElementById('tab_back2').style.color = "#343434";
 document.getElementById('tab_back3').style.background = "url(images/ps_new_2010/product_page/tab_grey.gif)";
 document.getElementById('tab_back3').style.color = "#343434";
 document.getElementById('tab_back4').style.background = "url(images/ps_new_2010/product_page/tab_grey.gif)";
 document.getElementById('tab_back4').style.color = "#343434";
 document.getElementById('tab_back5').style.background = "url(images/ps_new_2010/product_page/tab_grey.gif)";
 document.getElementById('tab_back5').style.color = "#343434";
 
 document.getElementById(tabName).style.background = "url(images/ps_new_2010/product_page/tab_red.gif)";
 document.getElementById(tabName).style.color = "#ffffff";

 var myAjax3 = new Ajax.Updater('ajax_desc_div', 'ajax.productdesc.php', {method: 'post', parameters: 'tab_number='+  tabName + '&product_id='+escape($F('productid')) });

}

var colour_selection="";
var size_selection = "";

function ajax_hide_mini_cart(){
 new Effect.SlideUp('ajax_mini_roll_cart');
 var myAjax7 = new Ajax.Updater('ajax_mini_roll_cart', 'ajax.minicart_add.php', {method: 'post', parameters: 'show_filler=true' });
 cart_box_open = "";
}

var cart_box_open="";

function ajax_check_and_hide_mini_cart() {
 if (cart_box_open=="yes") {
  ajax_hide_mini_cart();
 }
}

function show_size_box(size_id) {

 for (var i = 0; i < my_sizes_array.length; i++) {
   toggle_off('size_' + my_sizes_array[i]);
   document.getElementById('link_s_select_' + my_sizes_array[i]).style.fontWeight  = "";
 }

 toggle('size_' + size_id);
 document.getElementById('link_s_select_' + size_id).style.fontWeight  = "bold";

}