function doCheckAll() {
  with (document.forms['cartform']) {
    for (var i=0; i < elements.length; i++) {
        if (elements[i].type == 'checkbox' && (elements[i].name == 'substbox' || elements[i].name == 'prodbox'))
           elements[i].checked = true;
    }
  }
}

function removeMarked() {
     document.forms['cartform'].submit();
}

function submitCategoryChange() {
    if(document.forms['categoryform'].allCategoriesbox.checked == true)
       document.forms['categoryform'].allCategories.value = "false";
    else
       document.forms['categoryform'].allCategories.value = "true";
   document.forms['categoryform'].submit();

}

function showInteraction(id) {
     if (document.getElementById(id).style.display == 'none')
     {
          document.getElementById(id).style.display = 'inline';
     }

	 buttonId = id + '1';
	 document.getElementById(buttonId).style.display = 'none';

	 buttonId2 = id + '2';
	 document.getElementById(buttonId2).style.display = 'inline';


}

function hideInteraction(id) {
     if (document.getElementById(id).style.display == 'none')
     {
          document.getElementById(id).style.display = 'none';
     }
     else
     {
          document.getElementById(id).style.display = 'none';
     }

	 buttonId = id + '1';
	 document.getElementById(buttonId).style.display = 'inline';
	 buttonId = id + '2';
	 document.getElementById(buttonId).style.display = 'none';
}