function onlinepayment_form_validation()

{
	if(document.TOPINDIATOUR.vpc_MerchTxnRef.value.length==0)
	{
		alert("Kindly enter Merchant Transaction Reference No");
		document.TOPINDIATOUR.vpc_MerchTxnRef.focus();
		return false;
	}

	if(document.TOPINDIATOUR.Amount.value.length==0)
	{
		alert("Kindly enter Amount");
		document.TOPINDIATOUR.Amount.focus();
		return false;
	}
	
	if (chkNumeric(document.TOPINDIATOUR.Amount.value) == false) 
    {
		alert("Please check - non numeric value!");
		document.TOPINDIATOUR.Amount.focus();
		return false;
    }
	document.TOPINDIATOUR.vpc_Amount.value=document.TOPINDIATOUR.Amount.value*100;

	if(document.TOPINDIATOUR.S_name.value.length==0)
	{
		alert("Kindly enter Your Name");
		document.TOPINDIATOUR.S_name.focus();
		return false;
	}
	
	if(document.TOPINDIATOUR.S_email.value.length==0)
	{
		alert("Kindly enter Your email ID");
		document.TOPINDIATOUR.S_email.focus();
		return false;
	}
	var aresmail=document.TOPINDIATOUR.S_email.value.indexOf("@");
	var dresmail=document.TOPINDIATOUR.S_email.value.lastIndexOf(".");
	var	resmail=parseInt(document.TOPINDIATOUR.S_email.value.length)-1;
	if ((document.TOPINDIATOUR.S_email.value.length < 6 ) || ((aresmail<1 || resmail-dresmail > 3 || dresmail-aresmail < 2 || resmail-dresmail < 2)) || (document.TOPINDIATOUR.S_email.value.indexOf(" ") > 0))

	{ 
		alert("Enter your correct Email-Address");
		document.TOPINDIATOUR.S_email.focus();
		return false;
	}
	
	if(document.TOPINDIATOUR.S_phone.value.length==0)
	{
		alert("Kindly enter Your phone No.");
		document.TOPINDIATOUR.S_phone.focus();
		return false;
	}

	if(document.TOPINDIATOUR.S_country.value.length==0)
	{
		alert("Kindly enter country name");
		document.TOPINDIATOUR.S_country.focus();
		return false;
	}
}

function chkNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789.";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }