function checkFields(){
 var fname = document.getElementById('fname');
 var lname = document.getElementById('lname');
 var email = document.getElementById('email');
 var phone = document.getElementById('phone');
 var country = document.getElementById('country');
 var state = document.getElementById('state');
 var description = document.getElementById('description');

 if(fname.value == undefined || fname.value == ''){
         alert('Type your First Name!');
         return false;
 }
 if(lname.value == undefined || lname.value == ''){
         alert('Type your Last Name!');
         return false;
 }
 if(email.value == undefined || email.value == '' || isValidEmail(email.value) == false){
         alert('Type correct E-mail Address!');
         return false;
 }
 if(phone.value == undefined || phone.value == ''){
         alert('Type your correct Phone Number!');
         return false;
 }
 if(country.value == undefined || country.value == ''){
         alert('Select your Country!');
         return false;
 }
 if(country.value == 'United States' && (state.value == undefined || state.value == '')){
         alert('Select your State!');
         return false;
 }
 if(description.value == undefined || description.value == ''){
         alert('Type your Description/Comments!');
         return false;
 }
 return true;
}

//function to check valid email address
function isValidEmail(strEmail){
  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
  if (strEmail.search(validRegExp) == -1) {
      return false;
  } 
  return true; 
}