/***********************************************



* DHTML Calcul de frequence script-  © PNC France 2008 (www.panneaux-isolants.fr)



* This notice must stay intact for legal use



* Version Francaise http://www.panneaux-isolants.fr***********************************************/
<!--
function freq_PNC() {
 var rate1 = document.calc.rate1.value;
 var rate2 = document.calc.rate2.value;
 var rate3 = document.calc.rate3.value;
 var rate4 = document.calc.rate4.value;
 var rate5 = document.calc.rate5.value;
 var rate6 = document.calc.rate6.value;
 var rate7 = document.calc.rate7.value;
 var rate8 = document.calc.rate8.value;
 document.calc.pay.value =roundit(10*(Math.log((Math.pow(10,
 (rate1/10)))+(Math.pow(10,
 (rate2/10)))+(Math.pow(10,
 (rate3/10)))+(Math.pow(10,
 (rate4/10)))+(Math.pow(10,
 (rate5/10)))+(Math.pow(10,
 (rate6/10)))+(Math.pow(10,
 (rate7/10)))+(Math.pow(10,
 (rate8/10))))/2.302585092994046),2);
 }


// -->