/*var default_status='   ?  -?';
window.status=default_status;*/


function cnt_change(id, val)
{	
	elem = document.getElementById("amount"+id);	
	var count =	parseInt(elem.value);
	if (isNaN(count)) count=1	
	count =count+parseInt(val);	
	if (count <= 0) count = 1
	elem.value = count;
}