function formsubmit()
{
var n=0; 
s0=s1="Empty fields:\n";
f1=document.getElementById("form");

if (f1.elements[0].value==""){s1+=" Subject"}
if (f1.elements[1].value==""){s1+="\n Name"}
if (f1.elements[2].value==""){s1+="\n Phone"}
if (f1.elements[3].value==""){s1+="\n E-mail"}
if (f1.elements[4].value==""){s1+="\n Your question"}
if (f1.elements[5].value==""){s1+="\n Security code"}


if (s1==s0){f1.submit()}
else{alert(s1);}
}