function do_cart_click(uid,act,count,pckg) {
  var btn_add=document.getElementById('btn_'+uid+'_add');
  var btn_del=document.getElementById('btn_'+uid+'_del');
  if(act=='add') {
    btn_add.style.display="none"; btn_del.style.display='';
    doAjax('ajax.php@action=add&item='+uid+'&count='+count+'&pckg='+pckg,'obj_cart')
  } else {
    if(btn_del && btn_add) { btn_add.style.display=''; btn_del.style.display='none'; }
    doAjax('ajax.php@action=remove&item='+uid,'obj_cart')
  }
}


function cart_scroll() {
  var getScroll=document.body.scrollTop;
  window.status=getScroll;
  if(getScroll>320) {
    div_cart.style.marginTop=getScroll-320;
  } else { div_cart.style.marginTop=0; }
}

function update_pckg(uid,value) {
  doAjax('ajax.php@action=update_pckg&item='+uid+'&count='+value,'dummy');
}

function update_count(uid,value) {
  doAjax('ajax.php@action=update_count&item='+uid+'&count='+value,'dummy');
}

function update_comment(uid,value) {
  doAjax('ajax.php@action=update_comment&item='+uid+'&count='+value,'dummy');
}

function update_details(uid,value) {
  doAjax('ajax.php@action=update_details&item='+uid+'&count='+value,'dummy');
}


function check_comment(obj) {
  var obj_str=obj.value;
  obj_str=obj_str.replace(/ /g,"");
  if(obj_str.length<=0) {
    obj.style.backgroundImage="url(imgs/items/text_comment.gif)";
  }
}