function insert_msg(msg) {
  document.getElementById('y_msg').innerHTML = msg;
  window.location.hash="logo";
}

function email_validate(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(email) == false) {
      return false;
   } else {
     return true;
   }
}

function show_hide_services_contact(num) {
  document.getElementById('inp_name').value="";
  document.getElementById('inp_company').value="";
  document.getElementById('inp_phone').value="";
  document.getElementById('inp_email').value="";
  document.getElementById('inp_message').value="";

  document.getElementById('chx1').checked=false;
  document.getElementById('chx2').checked=false;
  document.getElementById('chx3').checked=false;
  document.getElementById('chx4').checked=false;

  if (num==1)
    document.getElementById('chx1').checked=true;

  if (num==2)
    document.getElementById('chx2').checked=true;

  if (num==3)
    document.getElementById('chx3').checked=true;

  if (num==4)
    document.getElementById('chx4').checked=true;

  if (document.getElementById('wrap_services_contact').style.display=='none'){
    document.getElementById('overlay_services_contact').style.display = 'block';
    document.getElementById('wrap_services_contact').style.display = 'block';
  } else {
    document.getElementById('overlay_services_contact').style.display = 'none';
    document.getElementById('wrap_services_contact').style.display = 'none';
  }

}