function checkForm()
{
var checkForm = false;
if (document.form.name.value!=="" && document.form.email.value!=="" && document.form.message.value!=="")
{
checkForm = true;
}

if (checkForm==false) DisplayErrors();
return checkForm;
} // end checkForm() function


function DisplayErrors()
{
if (document.form.name.value=="") alert("Please enter your name");
if (document.form.email.value=="") alert("Please enter your email");
if (document.form.message.value=="") 
alert("Please enter your message");
}