<script type="text/javascript">
function calculate_amt(count,price)
{

	var ref_amt = document.getElementById("ref_amt").value;
        var total_ref = document.getElementById('total_ref').innerHTML;
        var total = parseInt(Math.round(count * price * 100)/100); //two decimal value
        var balance = 0;

	ref_amt = parseInt(ref_amt);

        if(isNaN(ref_amt))
        {
                ref_amt = 0;
                balance = Math.round(total * 100)/100;
        }
        else
        {
	        balance = Math.round((total - ref_amt)* 100)/100;
	}
	if(balance < 0)
	{
	        balance = 0;
	}
	if(isNaN(count))
	{
		document.getElementById("quantity").value = '1';
		return;
	}

	if(count == 0)
	{
		document.getElementById("quantity").value = '1';
		return;
	}

	if(ref_amt <= total_ref)
        {
                if(ref_amt > total)
                {
                        document.getElementById('ref_amt').value = 0;
                }
        }
        else
        {
                document.getElementById('ref_amt').value = 0;
        }

	document.getElementById("total_amt1").innerHTML=balance;
	document.getElementById("payable_total_amt").innerHTML=balance;
	document.getElementById("AMT").value = balance;

        var data = document.getElementById("CUSTOM").value;
        var cid = data.split(",",1);
        if(count=='') count = 1;
        var cumm = cid+","+count
        document.getElementById("CUSTOM").value='';
	document.getElementById("CUSTOM").value=cumm;
}

function calculate_referral(ref_amt,price)
{
	ref_amt = parseInt(ref_amt);
        var count = document.getElementById('quantity').value;
        var purchase_price;
        var total_ref = document.getElementById('total_ref').innerHTML;
        var total;
        var balance = 0;
	var ref_amt_bal = parseInt(document.getElementById('ref_amt_bal').value);

	if(ref_amt_bal >= ref_amt && parseInt(document.getElementById("total_amt1").innerHTML) >= ref_amt ){
		// Condition to check whether entered amount is with in Original balance & total order
		//alert("success");
	}else{
		alert("Enter applicable refferal amount!"); document.getElementById('ref_amt').value = '';
		document.getElementById('ref_amt').value = 0;
		balance = Math.round(count * price * 100)/100; //two decimal value

		document.getElementById("total_amt1").innerHTML=balance;
		document.getElementById("payable_total_amt").innerHTML=balance;
		document.getElementById("AMT").value = balance;
		var data = document.getElementById("CUSTOM").value;
		var cid = data.split(",",1);
		if(count=='') count = 1;
		var cumm = cid+","+count
		document.getElementById("CUSTOM").value='';
		document.getElementById("CUSTOM").value=cumm;
		return;
	}

	if(isNaN(count))
	{
		document.getElementById("quantity").value = '1';
		return;
	}

	if(count == 0)
	{
		document.getElementById("quantity").value = '1';
		return;
	}
        total = Math.round(count * price * 100)/100; //two decimal value
        if(isNaN(ref_amt))
        {
                ref_amt = 0;
                balance = Math.round(total* 100)/100;
        }
        else
        {
	        balance = Math.round((total - ref_amt)* 100)/100;
	}
	if(balance < 0)
	{
	        balance = 0;
	}
        if(ref_amt <= total)
        {

                if(ref_amt > total_ref)
                {
                       document.getElementById('ref_amt').value = ref_amt;
                }
        }
        else
        {
                document.getElementById('ref_amt').value = 0;
        }

	document.getElementById("total_amt1").innerHTML=balance;
	document.getElementById("payable_total_amt").innerHTML=balance;
	document.getElementById("AMT").value = balance;

        var data = document.getElementById("CUSTOM").value;
        var cid = data.split(",",1);
        if(count=='') count = 1;
        var cumm = cid+","+count
        document.getElementById("CUSTOM").value='';
	document.getElementById("CUSTOM").value=cumm;

}
</script>