function ckCombination(){
	var comb_result=0; var comb_selected=0; var arr_convertion=new Array(); var arr_convertion_code=new Array(); var convertion=1; 
	var convertion_code="gr"; price_adds=0; var regex_number=/^[0-9]+$/; var price_temp=0;
	if(getE("txtStock").value>0){
		for(var i=0;i<comb.length;i++){
			for(var j=1;j<comb[i][0].length;j++){
				if(getE("txtTotalGroupCombination").value>0){
					for(var k=1;k<=getE("txtTotalGroupCombination").value;k++){
						if(getE("cbAttribute_"+k).value==comb[i][0][j]){ comb_result++; }
					}
				}
			}
			if(comb_result<getE("txtTotalGroupCombination").value){ comb_result=0; } else { comb_selected=i; i=comb.length; }
		}
	}
				arr_convertion[0]=1;
			arr_convertion_code[0]="gr";
						arr_convertion[1]=0.001;
			arr_convertion_code[1]="Kg";
				if(comb_result<getE("txtTotalGroupCombination").value){
		if(getE("txtStock").value>0){
			getE("combNotFoundExplanation").innerHTML="<b>Ketersediaan produk:</b> Tidak ada stok produk dengan spesifikasi ini. Pilihlah produk dengan spesifikasi lainnya.";
		}
		getE("combShowHide").style.visibility="hidden"; getE("combPrice").innerHTML="<b>Rp "+number_format(final_price,(regex_number.test(final_price)? 0:2),",",".")+"</b>";
	} else { 
		getE("combNotFoundExplanation").innerHTML=""; getE("combShowHide").style.visibility="visible";
		if(getE("txtUseCombination").value==1){
			weight=comb[comb_selected][3]/convertion;
			price_adds=Math.round((comb[comb_selected][2]*1)*100)/100;
			price_temp=Math.round((final_price+price_adds)*100)/100;
			getE("combPrice").innerHTML="<b>Rp "+number_format(price_temp,(regex_number.test(price_temp)? 0:2),",",".")+((price_adds>0)?"</b> (+Rp "+number_format(price_adds,(regex_number.test(price_adds)? 0:2),",",".")+")":"");
		}
	}
	for(var i=0;i<arr_convertion.length;i++){
		if(weight>(1/arr_convertion[i])){ convertion=(1/arr_convertion[i]); convertion_code=arr_convertion_code[i];	}
	}
	weight=weight/convertion;
	getE("combWeight").innerHTML=weight+" "+convertion_code;
}

function number_format (number, decimals, dec_point, thousands_sep) {
	var n = number, prec = decimals;
	var toFixedFix = function (n,prec) { var k = Math.pow(10,prec); return (Math.round(n*k)/k).toString(); };
	n = !isFinite(+n) ? 0 : +n;
	prec = !isFinite(+prec) ? 0 : Math.abs(prec);
	var sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep;
	var dec = (typeof dec_point === 'undefined') ? '.' : dec_point;
	var s = (prec > 0) ? toFixedFix(n, prec) : toFixedFix(Math.round(n), prec); //fix for IE parseFloat(0.55).toFixed(0) = 0;
	var abs = toFixedFix(Math.abs(n), prec);
	var _, i;
	if (abs >= 1000) {
		_ = abs.split(/\D/);
		i = _[0].length % 3 || 3;
		_[0] = s.slice(0,i + (n < 0)) +
		_[0].slice(i).replace(/(\d{3})/g, sep+'$1');
		s = _.join(dec);
	} else { s = s.replace('.', dec); }
	var decPos = s.indexOf(dec);
	if (prec >= 1 && decPos !== -1 && (s.length-decPos-1) < prec) { s += new Array(prec-(s.length-decPos-1)).join(0)+'0'; }
	else if (prec >= 1 && decPos === -1) { s += dec+new Array(prec).join(0)+'0'; }
	return s;
}