var m2=0;

function hesapla(form)
{
m2=Math.round(eval(form.metrekare.value));
if (m2>0)  {

 alcipanfx= Math.round(eval(m2 * 1));
 form.alcipanfx.value=alcipanfx+" m2"

 artfixTC=Math.round(eval(m2*3/3))
 form.artfixTC.value=artfixTC+" boy"

 artfixTU=Math.round(eval(m2*0.5/3))
 form.artfixTU.value=artfixTU+" boy"

 celikdubel=Math.round(eval(m2*0.9))
 form.celikdubel.value=celikdubel+" adet"


 askiteli=Math.round(eval(m2*0.9))
 form.askiteli.value=askiteli+" adet"


 askimasasi=Math.round(eval(m2*0.9))
 form.askimasasi.value=askimasasi+" adet"

 klips=Math.round(eval(m2*4))
 form.klips.value=klips+" adet"


 eklemeparcasi=Math.round(eval(m2*0.3))
 form.eklemeparcasi.value=eklemeparcasi+" adet"

 borozanvida=Math.round(eval(m2*11))
 form.borozanvida.value=borozanvida+" adet"


 derzbandi=Math.round(eval(m2*1.7/90))
 form.derzbandi.value=derzbandi+" rulo"


 dugagipsderzdolgu=Math.round(eval(m2*0.3/30))
 form.dugagipsderzdolgu.value=dugagipsderzdolgu+" torba"

 dubelvida=Math.round(eval(m2*0.8))
 form.dubelvida.value=dubelvida+" adet"


 } else { alert("HATA: m² \"0\" dan buyuk olmalidir!");
 document.forms[0].metrekare.focus();}

 }