function check_data(){
if(document.form1.first_name.value == "")
  {
   alert("Please enter Your First name!");
   return false;
  }
if(document.form1.last_name.value == "")
  {
   alert("Please enter Your Last name!");
   return false;
  }
if(document.form1.gender[0].checked == false && document.form1.gender[1].checked == false )
  {
   alert("Please enter Gender!");   
   return false;
  }  
	box = document.forms[0].birth_day;
	destination5 = box.options[box.selectedIndex].value;
	box = document.forms[0].birth_year;
	destination4 = box.options[box.selectedIndex].value;
	box = document.forms[0].birth_month;
	destination6 = box.options[box.selectedIndex].value;
if(destination4 == "" || destination5 == "" || destination6 == "")  {
   alert("Please enter Your date of birth!");
   return false;
  }
if(document.form1.email.value == "")
  {
   alert("Please enter email address!");
   return false;
  }
if(document.form1.country.value == "")
  {
   alert("Please enter country!");
   return false;
  }
if(document.form1.day_phone.value == "")
  {
   alert("Please enter Day phone Number!");
   return false;
  }
if(document.form1.evening_phone.value == "")
  {
   alert("Please enter Evening phone number!");
   return false;
  }
if(document.form1.nation.value == "")
  {
   alert("Please enter Your nationality!  ");
   return false;
  }
if(document.form1.address.value == "")
  {
   alert("Please enter Your address");
   return false;
  }
  	box = document.forms[0].start_year;
	destination1 = box.options[box.selectedIndex].value;
  	box = document.forms[0].start_month;
	destination2 = box.options[box.selectedIndex].value;
  	box = document.forms[0].start_day;
	destination3 = box.options[box.selectedIndex].value;
  	box = document.forms[0].end_year;
	destination4 = box.options[box.selectedIndex].value;
  	box = document.forms[0].end_month;
	destination5 = box.options[box.selectedIndex].value;
  	box = document.forms[0].end_day;
	destination6 = box.options[box.selectedIndex].value;
if(destination1 == "" || destination2 == "" || destination3 == "" || destination4 == "" || destination5 == "" || destination6 == "")  {
   alert("Please correct your tour date");
   return false;
  }
 
return true;
}