function Write(url, content, subcat, maincat, parentlvlid, storeid, descr)	// url is the script and data is a string of parameters
	{ 
		var xhr = createXHR();

		xhr.onreadystatechange=function()
		{ 
			if(xhr.readyState == 4)
			{
				var items = document.getElementById("items"); 
				items.innerHTML =  xhr.responseText;				
				document.body.style.cursor = 'default';
//				var newUrl = 'products.php?subcat='+subcat+"&maincatid="+maincat+"&parentlvlid="+parentlvlid+"&storeid="+storeid+"&descr="+descr;
//				window.history.pushState(document.URL, "", newUrl);

			}
		}; 
		document.body.style.cursor = 'wait';
		xhr.open("POST", url, true);		
		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		xhr.send(content); 
		
	} 

	function submitForm(subcat, maincat, parentlvlid, storeid, descr)
	{ 
//alert("subcat="+subcat+"\nmaincatid="+maincat+"\nparentlvlid=" + parentlvlid+"\nstoreid="+storeid+"\ndescr="+descr);	
				if ( maincat == 2 ) {
					window.location.href = 'books.php?subcat='+subcat+"&maincatid="+maincat+"&parentlvlid="+parentlvlid+"&storeid="+storeid+"&descr="+descr;
				} else if ( maincat == 8 ) {
					window.location.href = 'cards.php?subcat='+subcat+"&maincatid="+maincat+"&parentlvlid="+parentlvlid+"&storeid="+storeid+"&descr="+descr;
				} else {
					window.location.href = 'products.php?subcat='+subcat+"&maincatid="+maincat+"&parentlvlid="+parentlvlid+"&storeid="+storeid+"&descr="+descr;
				}								

		Write("scripts/productsajax.php", "subcat="+subcat+"&maincatid="+maincat+"&parentlvlid=" + parentlvlid+"&storeid="+storeid+"&descr="+descr, subcat, maincat, parentlvlid, storeid, descr);
	}