function validate(){

    if (document.form1.realname.value=="")
    {
      alert("Please Enter Full Name " );
      document.form1.realname.focus();
      return false;
    }
	if (document.form1.email.value=="")
    {
      alert("please enter your Email Id" );
      document.form1.email.focus();
      return false;
    }
 if (invalidemail(document.form1.email.value))
    {
  
  alert("Email address should be of type 'abc@pqr.some extention' ");
       document.form1.email.focus();
       return false;
    }
	 if (document.form1.Address.value=="")
    {
      alert("Please Enter Address " );
      document.form1.Address.focus();
      return false;
    }
	if (document.form1.Telephone_No.value=="")
    {
      alert("please enter your Telephone number " );
      document.form1.Telephone_No.focus();
      return false;
    }
  	if (isNaN(document.form1.Telephone_No.value))
    {
      alert("Telephone number should be an integer" );
      document.form1.Telephone_No.focus();
      return false;
    }
	
	if ((document.form1.Type_of_Rooms[0].checked==false)&& (document.form1.Type_of_Rooms[1].checked==false) && (document.form1.Type_of_Rooms[2].checked==false))
    {
      alert("please choose the type of Room required " );
      document.form1.Type_of_Rooms[0].focus();
      return false;
    }
	
	if (document.form1.rooms.value=="")
    {
      alert("please enter the number of Rooms required" );
      document.form1.rooms.focus();
      return false;
    }
	
	   if (document.form1.adults.value=="")
    {
      alert("please enter the number of Adults " );
      document.form1.adults.focus();
      return false;
    }

	
	  if (document.form1.start_date.value=="")
    {
      alert("please select the Arrival Date " );
      document.form1.start_date.focus();
      return false;
    }
	
	  if (document.form1.end_date.value=="")
    {
      alert("please select the Departure Date " );
      document.form1.end_date.focus();
      return false;
    }
	  

	  	
	//if(document.form1.end_date.value < document.form1.start_date.value)
	//{
		///alert("The departure date should be later then arrival date");
		//document.form1.end_date.focus();
		//return false;
		
	//}
	if ((document.form1.Would_you_prefer_Airport_pickup[0].checked==false) && (document.form1.Would_you_prefer_Airport_pickup[1].checked==false))
    {
      alert("Would you prefer pickup/drop " );
      document.form1.Would_you_prefer_Airport_pickup[0].focus();
      return false;
    }
	
else return true;
}

function invalidemail(s)
{
  res=0;
  len=s.length;

   for(i=0;i<len;i++)
     { 
       if(s.charAt(i)=='@' )
	 
   for(j=i;j<len;j++)
            {
              if(s.charAt(j)=='.')
                  res=1;
	
             }
     }  
if (res==0)
    return true; 
  else
     return false; 
   
}