
<!--

    function checkForZero(field) {

        if (field.value == 0 || field.value.length == 0) {

            alert ("This field can't be 0!");

            field.focus(); }

        else

	    calculatePayment(field.form);

    }


    function cmdCalc_Click(form) {

        if (form.price.value == 0 || form.price.value.length == 0) {

            alert ("The Price field can't be 0!");

            form.price.focus(); }

        else if (form.ir.value == 0 || form.ir.value.length == 0) {

            alert ("The Interest Rate field can't be 0!");

            form.ir.focus(); }

        else if (form.term.value == 0 || form.term.value.length == 0) {

            alert ("The Term field can't be 0!");

            form.term.focus(); }

        else

            calculatePayment(form);

    }


    function calculatePayment(form) {

        princ = form.price.value - form.dp.value;

        intRate = (form.ir.value/100) / 12;

        months = form.term.value * 12;

        form.pmt.value = Math.floor((princ*intRate)/(1-Math.pow(1+intRate,(-1*months)))*100)/100;

  	form.principle.value = princ;

	form.payments.value = months;

    }

//-->