function valCont() {

  if (document.contact.email.value.length == 0) {
    alert('Please enter your email id.');
    document.contact.email.focus();
    return false;
  }
  
  if (echeck(document.contact.email.value) == false) {
    document.contact.email.value = "";
    document.contact.email.focus();
    return false;
  }
  
  
  
  //-------------------------------------------------------------------------------------------------------------------
  
  var check_status = 0;
  
  if (document.getElementById('chk1').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk2').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk3').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk4').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk5').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk6').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk7').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk8').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk9').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk10').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk11').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk12').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk13').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk14').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk15').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk16').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk17').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk18').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk19').checked) {
    check_status = check_status + 1;
  }
  
  if (document.getElementById('chk20').checked) {
    check_status = check_status + 1;
  }
  
  
  
  
  
  
  
  
  
  if ((document.contact.staff.value == "") && (check_status == 0)) {
    alert('Please select checkbox or name from drop down list.');
    document.contact.staff.focus();
    return false;
  }
  
  
  
  if ((document.contact.staff.value != "") && (check_status != 0)) {
    alert('You have selected both check box and drop down, please select one');
    document.contact.staff.focus();
    return false;
  }
  
  
  
  //--------------------------------------------------
  
  
  
  
  
  if (document.contact.Question.value.length == 0) {
    alert('Please enter your comments.');
    document.contact.Question.focus();
    return false;
  }
  
}



function echeck(str) {

  var at = "@"
  
  var dot = "."
  
  var lat = str.indexOf(at)
  
  var lstr = str.length
  
  var ldot = str.indexOf(dot)
  
  if (str.indexOf(at) == -1) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  if (str.indexOf(at) == -1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  if (str.indexOf(dot) == -1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  if (str.indexOf(at, (lat + 1)) != -1) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  if (str.indexOf(dot, (lat + 2)) == -1) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  if (str.indexOf(" ") != -1) {
  
    alert("Invalid E-mail ID")
    
    return false
    
  }
  
  return true
  
}