function checkError() {
   //Check have input or not
   if (document.FormContactus.name.value=="") {
     alert("Please enter your 'Name'");
     document.FormContactus.name.focus();
     return false; //Do not submit
   }
   if (document.FormContactus.from.value=="") {
     alert("Please enter 'From'");
     document.FormContactus.from.focus();
     return false; //Do not submit
   }
   if (document.FormContactus.email.value=="") {
     alert("Please enter the 'Email address'");
     document.FormContactus.email.focus();
     return false; //Do not submit
   }
   if (document.FormContactus.content.value=="") {
     alert("Please enter the 'Content'");
     document.FormContactus.content.focus();
     return false; //Do not submit
   }
   
   return true;
}

function clearField() {
		var fieldInput = document.FormContactus.content;
		if( fieldInput.value == "Enter your message here ..." ) fieldInput.value = "";
}

function changeClass() {
		document.FormContactus.name.value = "input-box-hl";
}