function cek(){

a=document.gt.m.value;
b=document.gt.d.value;
c=document.gt.y.value;
a1=document.gt.mdep.value;
b1=document.gt.ddep.value;
c1=document.gt.ydep.value;
txt=document.gt.email.value;
var digits="0123456789"
var today= new Date();
var year= today.getYear();
var th =  year;
var bl = today.getMonth();
var mm = bl+1;
var dd = today.getDate()

var jml = today.toLocaleString();


if(document.gt.nama1.value==""){
alert("Please enter your first name");
//alert(user);
  	document.gt.nama1.focus();
  	return false;
  }
if(document.gt.nama2.value==""){
alert("Please enter your last name");
  	document.gt.nama2.focus();
  	return false;
  }
if(document.gt.company.value==""){
alert("Please enter your company name");
  	document.gt.company.focus();
  	return false;
  }
if(document.gt.email.value==""){
alert("Please enter your e-mail address");
  	document.gt.email.focus();
  	return false;
  }
if (txt.match((/(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/)) || !(txt.match(/^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,4})(\]?)$/))) {
alert("I'm sorry. You've entered an invalid email address.");
document.gt.email.focus();
  	return false;
   }
if(document.gt.alamat.value==""){
alert("Please enter your address");
  	document.gt.alamat.focus();
  	return false;
  }
if (document.gt.kota.value==""){
 alert("Please enter your city");
  	document.gt.kota.focus();
  	return false;
  }
if (document.gt.phone.value==""){
 alert("Please enter your telephone number");
  	document.gt.phone.focus();
  	return false;
  }
if (document.gt.negara.selectedIndex==0){
 alert("Please enter your country");
  	document.gt.negara.focus();
  	return false;
  }

/*
 if (document.gt.type.selectedIndex==0){
 alert("Please enter the type of room(s) required");
  	document.gt.type.focus();
  	return false;
  }

  if (document.gt.room.selectedIndex==0){
 alert("Please enter the number of room(s) required");
  	document.gt.room.focus();
  	return false;
  }
  
if (document.gt.m.value==""){
 alert("Please enter the check-in month");
  	document.gt.m.focus();
  	return false;
  }
if(a<1 || a>12){
alert("Please correct the check-in month");
  	document.gt.m.focus();
  	return false;
 }
for (var i=0;i<document.gt.m.value.length;i++){
temp=document.gt.m.value.substring(i,i+1)
if (digits.indexOf(temp)==-1){
alert("Please correct the check-in month")
document.gt.m.focus;
return false;
      }
   }
if (document.gt.d.value==""){
 alert("Please enter the check-in date");
  	document.gt.d.focus();
  	return false;
  }

if(b<1 || b>31 ){
alert("Please correct the check-in date");
  	document.gt.d.focus();
  	return false;
 }
for (var i=0;i<document.gt.d.value.length;i++){
temp1=document.gt.d.value.substring(i,i+1)
if (digits.indexOf(temp1)==-1){
alert("Please correct the check-in date")
document.gt.d.focus;
return false;
      }
   }
if (document.gt.y.value==""){
 alert("Please enter the check-in year");
  	document.gt.y.focus();
  	return false;
  }
if(c<th ){
alert("Year must be at least " + th);
  	document.gt.y.focus();
  	return false;
 }

for (var i=0;i<document.gt.y.value.length;i++){
temp2=document.gt.y.value.substring(i,i+1)
if (digits.indexOf(temp2)==-1){
alert("Please correct the check-in year!")
document.gt.y.focus;
return false;
      }
   }

if(c==th){
	if(a<mm){
	alert("Please correct your check-in date");
	document.gt.m.focus();
	return false;
	}
	if(a==mm){
		if(b<dd){
			alert("Please correct your check-in date");
			document.gt.d.focus();
			return false;
			}
		}
}   

//departure
if (document.gt.mdep.value==""){
 alert("Please enter departure month");
 //alert(user);
  	document.gt.mdep.focus();
  	return false;
  }
if(a1<1 || a1>12){
alert("Please correct your departure month");
  	document.gt.mdep.focus();
  	return false;
 }
for (var i=0;i<document.gt.mdep.value.length;i++){
temp3=document.gt.mdep.value.substring(i,i+1)
if (digits.indexOf(temp3)==-1){
alert("Please correct your departure month")
document.gt.mdep.focus;
return false;
      }
   }
if (document.gt.ddep.value==""){
 alert("Please enter your departure date");
  	document.gt.ddep.focus();
  	return false;
  }
if(b1<1 || b1>31){
alert("Please correct your departure date");
  	document.gt.ddep.focus();
  	return false;
 }
for (var i=0;i<document.gt.ddep.value.length;i++){
temp4=document.gt.ddep.value.substring(i,i+1)
if (digits.indexOf(temp4)==-1){
alert("Please enter your Invalid Date !")
document.gt.ddep.focus;
return false;
      }
   }
if (document.gt.ydep.value==""){
 alert("Please enter your Field Year");
  	document.gt.ydep.focus();
  	return false;
  }
if(c1<th ){
alert("Please enter your Year must be atleast " + th);
  	document.gt.ydep.focus();
  	return false;
 }
for (var i=0;i<document.gt.ydep.value.length;i++){
temp5=document.gt.ydep.value.substring(i,i+1)
if (digits.indexOf(temp5)==-1){
alert("Please enter your Invalid Year!")
document.gt.ydep.focus;
return false;
      }
   }

//Pengurangan Tahun
if(c1-c < 0){
 alert("Please enter your invalid year of departure");
 document.gt.ydep.focus();
 return false;
}
if(c1-c==0)
{
	if(a1-a<0){
		alert("Please enter your invalid month");
		document.gt.mdep.focus();
		return false;
	} 
	if(a1-a==0){
		if(b1-b<1){
			alert("Please enter your invalid date");
			document.gt.ddep.focus();
			return false;
		}
	}
}

//tentang adult
if (document.gt.adult.selectedIndex==0){
 alert("Please enter your The Number of Adult");
  	document.gt.adult.focus();
  	return false;
  }
 if (document.gt.children.selectedIndex==0){
 alert("Please enter your The Number of Children");
  	document.gt.children.focus();
  	return false;
  }
*/
  return true;
}