function subForm(mes,mesmail){
var need=new Array('name','email','feedback');
var x=document.getElementById('fb_form');
for (detail in need)
{
  if(document.getElementById(need[detail]).value.length<1){
	  alert(mes);
	  return false;
  }
}
var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,5})+$/;
if(!filter.test(document.getElementById('email').value)){
  alert(mesmail);
  return false;
}
x.submit();
}