function clearformvalues(form) {        
        form.amount.value = ""
        form.years.value = ""
        form.interest.value = ""
        form.rate.value = ""
     }        


function roundOff(numeric) {

        figureChange = numeric * 100
        figureChange = Math.round( figureChange )
        roundNow     = "" + figureChange
        goFigure     = roundNow.length
        return roundNow.substring( 0 , goFigure - 2 ) + "." + roundNow.substring( goFigure - 2 , goFigure )
        }
        
function computerate(form)
{
   if((form.amount.value.length != 0) && (form.interest.value.length != 0) && (form.years.value.length != 0))
   {
      amount = eval(form.amount.value)
      years     = eval(form.years.value)
      interest  = eval(form.interest.value) / 100.0
      if ( years == 0.0){
         alert(" Number of Years should be greater than 0")
      }else{
                var r = form.interest.value;
        
        if (r > 0.99) {
            r = r / 100.0;
         }
        r /= 12;
	    years *=12;

        var pow = 1;
        for (var s = 0; s < years; s++)
            pow = pow * (1 + r);
        form.rate.value = ""+ roundOff((form.amount.value * pow * r) / (pow - 1))
    }
   }else{
      alert("Please fill out all fields!")
   }
}