function showItems(field,n,str) {
 var item_disp = "";
 var oDiv=document.getElementById(field.id);  
 for(var i=0; i<n; i++) {
  item_disp += str + '<input type="text" name="' + field + i + '"><br>';
 }
 no_options=n;
 oDiv.innerHTML = item_disp;
}

function showhide(field,n,m) {
	var i = 0;
	var j = 0;
	
	for (i=0;i<n;i++) {
		document.getElementById(field+i).style.display = 'none';
	}
	
 	for (j=0;j<m;j++) {
		document.getElementById(field+j).style.display = '';
		document.forms['register'].elements['host'+j].value=document.forms['register'].elements['domain'+j].value + '.' + document.forms['register'].elements['type'+j].value;
		/*eval('document.all.host'+j).value=eval('document.all.domain'+j).value + '.' + eval('document.all.type'+j).value;*/
	}	
}

function displaydura(n) {
	if (document.forms['register'].elements['package'+n].value=='PRO 2' || document.forms['register'].elements['package'+n].value=='PRO 3' || document.forms['register'].elements['package'+n].value=='PRO 4' || document.forms['register'].elements['package'+n].value=='PRO 5') {
		document.getElementById('duraitems'+n).style.display = '';
		document.getElementById('gduraitems'+n).style.display = 'none';
	} else {
		document.getElementById('duraitems'+n).style.display = 'none';
		document.getElementById('gduraitems'+n).style.display = '';
	}
}

function calculate() {
	var i = 0;
	var j = 0;
	var n = document.forms['register'].elements['dquan'].value;
	var m = document.forms['register'].elements['hquan'].value;

	var sum = 0;
	for (i=0;i<n;i++) {
		if (document.forms['register'].elements['type'+i].value=='com')
			sum += parseFloat(document.forms['register'].elements['com'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
		else if (document.forms['register'].elements['type'+i].value=='net')
			sum += parseFloat(document.forms['register'].elements['net'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
		else if (document.forms['register'].elements['type'+i].value=='org')
			sum += parseFloat(document.forms['register'].elements['org'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
		else if (document.forms['register'].elements['type'+i].value=='biz')
			sum += parseFloat(document.forms['register'].elements['biz'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
		else if (document.forms['register'].elements['type'+i].value=='info')
			sum += parseFloat(document.forms['register'].elements['info'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
		else if (document.forms['register'].elements['type'+i].value=='com.vn')
			sum += parseFloat(document.forms['register'].elements['comvn'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
		else if (document.forms['register'].elements['type'+i].value=='vn')
			sum += parseFloat(document.forms['register'].elements['vn'].value) * parseInt(document.forms['register'].elements['ddura'+i].value);
	}
	
 	for (j=0;j<m;j++) {
		if (document.forms['register'].elements['package'+j].value=='PRO 1' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura1'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 1' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura1'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 2' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura26'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 2' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura2'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 2' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura26'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 2' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura2'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 3' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura36'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 3' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura3'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 3' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura36'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 3' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura3'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 4' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura46'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 4' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura4'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 4' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura46'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 4' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura4'].value);
			else if (document.forms['register'].elements['package'+j].value=='PRO 5' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura56'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 5' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][1].checked == true)
			sum += parseFloat(document.forms['register'].elements['ushura5'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 5' && document.forms['register'].elements['dura'+j].value=='6 months' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura56'].value);
		else if (document.forms['register'].elements['package'+j].value=='PRO 5' && document.forms['register'].elements['dura'+j].value=='1 year' && document.forms['register'].elements['place'+j][0].checked == true)
			sum += parseFloat(document.forms['register'].elements['vnhura5'].value);
	}
	
	document.forms['register'].elements['usdtext'].value = formatNumber(sum,2);
	document.forms['register'].elements['vndtext'].value = formatNumber(sum * parseInt(document.forms['register'].elements['rate'].value),0);
	
	document.forms['register'].elements['usd'].value = sum;
	document.forms['register'].elements['vnd'].value = sum * parseInt(document.forms['register'].elements['rate'].value);	
	
}