var navClicked = false;
function nav(page, keywords, params, direction, totalItems, sort){
	if(navClicked == false){
		navClicked = true;
		if (document.getElementById('btnNext')) document.getElementById('btnNext').disabled = true;
		if (document.getElementById('btnBack')) document.getElementById('btnBack').disabled = true;
		url = "webshop.asp?act=catalog&page="+page+"&keywords="+keywords+""+params+"&sort="+sort;
//		alert (url);
		if (keywords.length > 0) {
			url = "/webshop/search/" + keywords + "/page/" + page
			document.location.href = url;
		}
		else {
			if (params.length > 0) {
				var ArrParams = params.split("&");
				var code = ArrParams[2].split("=")[1]
				var cid = ArrParams[3].split("=")[1]
				url = "/back-stage/catalog/cid/" + cid + "/code/" + code + "/" + page
				document.location.href = url;	
			}
			else {
				url = "/back-stage/catalog/" + page + "/sort/" + sort
				document.location.href = url;
			}
		}		
		
	}
}

function calcHeight()
{
  var the_height = document.getElementById('externalframe').contentWindow.document.body.scrollHeight;

  document.getElementById('externalframe').height= the_height;
}

function isNumber(input){
if(input.value.length > 0 && !input.value.match(/^[0-9]+$/g)){
   input.value = input.value.replace(/[^0-9]*/g,'');
}
}
function isNumberFraction(input){
if(input.value.length > 0 && !input.value.match(/^[0-9.,]+$/g)){
   input.value = input.value.replace(/[^0-9.,]*/g,'');
}
}