Java script error script works but still get error

I have a javascript that functions properly but I get an error at the bottom of browser in IE

Here is the script


<script language="JavaScript" type="text/JavaScript">

<!--

function settax(Info){

if(Info.state.value == ""){return false;}<<<---Line 25 from error code

if(Info.state.value == "MA"){

Info.tax.value = 5;

}else{

Info.tax.value = 0;
}

recalculate(Info);

return false;

}

function recalculate(Info){
var qty = parseInt(Info.qty.value);
if(isNaN(qty)) qty = 0;
var price = parseFloat(Info.price.value);
var shiphand = parseFloat(Info.shiphand.value);
var shiphand = 3.00;
var tax = parseFloat(Info.tax.value) * .01;

price *= qty;
shiphand = (qty > 1)?(shiphand + ((qty - 1) * 1.5)):(qty == 1)?(shiphand):(0);
tax *= price;

Info.shiphand.value = (3.00 + ((Info.qty.value - 1) * 1.50)).toFixed(2);

Info.total.value = (price + tax + shiphand).toFixed(2);
}
//-->

onLoad = settax(document.buynow);

</script>


The error in IE reads like this

Line: 25
Char:2
Error:'state' is not null or not an object
Code:0
URL:


Now in the script above I labeled line 25 of the script.

Can anyone tell me how to keep the script working but not have that error.

Thanks

Change this:

onLoad = settax(document.buynow);

to:

window.onload = function(){settax(document.buynow)};

The error occurs because settax() is called before the form has loaded. Your original onload line calls the settax() function and not set it to the handler.

Thank You Very Much.

I apppreciate the help.

Works great now.