function show_hide(val) {
  if (val=="Flight") {
    document.getElementById('flight1').style.display='block';
    document.getElementById('flight2').style.display='block';
    document.getElementById('flight3').style.display='block';
    document.getElementById('flight4').style.display='block';
    document.getElementById('flight5').style.display='block';
    document.getElementById('flight6').style.display='block';
    document.getElementById('flight7').style.display='block';
    document.getElementById('flight8').style.display='block';
  } else {
    document.getElementById('flight1').style.display='none';
    document.getElementById('flight2').style.display='none';
    document.getElementById('flight3').style.display='none';
    document.getElementById('flight4').style.display='none';
    document.getElementById('flight5').style.display='none';
    document.getElementById('flight6').style.display='none';
    document.getElementById('flight7').style.display='none';
    document.getElementById('flight8').style.display='none';
    
  }
  
}

function show_hide2(val) {
  if (val == "3 Days 2 Nights Diving Package" || val == "4 Days 3 Nights Diving Package") {
    document.getElementById('diving1').style.display='block';
    document.getElementById('diving2').style.display='block';
  } else {
    document.getElementById('diving1').style.display='none';
    document.getElementById('diving2').style.display='none';
    
  }
  
}

function input_filterAmt (str, dec, bNeg) 
{ // auto-correct input - force numeric data based on params. 
 var cDec = '.'; // decimal point symbol 
 var bDec = false; var val = ""; 
 var strf = ""; var neg = ""; var i = 0; 

 //if (str == "") return; 
 if(str != "" && str != "-"){

 parseFloat ("0").toFixed (dec); 
 if (bNeg && str.charAt (i) == '-') { neg = '-'; i++; } 

 for (i; i < str.length; i++) 
 { 
  val = str.charAt (i); 
  if (val == cDec) 
  { 
   if (!bDec) { strf += val; bDec = true; } 
  } 
  else if (val >= '0' && val <= '9') 
   strf += val; 
 } 
 strf = (strf == "" ? 0 : neg + strf); 
 return parseFloat (strf).toFixed (dec); 
 }
 
 else if(str != "" && str == "-"){
      return str;
 
 }
 return "";
}