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"

 agraf=Math.round(eval(m2*1.2))
 form.agraf.value=agraf+" adet"


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


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

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

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


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

 }