function cmdCalc_Click(form) {
//	form=document.getElementById('mortgagecalc');
        if (form.price.value == 0 || form.price.value.length == 0) {
            alert ("Please enter the Mortgage amount");
            form.price.focus(); }
        else if (form.term.value == 0 || form.term.value.length == 0) {
            alert ("Please enter the Repayment term");
            form.term.focus(); }
        else
            calculatePayment(form);
    }

    function calculatePayment(form) {
        princ = form.price.value;
        intRate = (form.ir.value/100/12);
        years = form.term.value;
		months=years*12
		payment = (intRate*princ*Math.pow((1+intRate),months))/((Math.pow((1+intRate),months)-1));
		
		form.pmt.value = payment.toFixed(2);
    }