WzorMaila=/^[0-9a-z._-]+@+[0-9a-z._-]+\.[a-z]{2,4}$/i;

function sprawdz(form)
{
 if (form.name.value=="Your Name") {
                          alert("Please enter Your Name");
                          form.name.focus();
                          return false;
                          }
 if (!WzorMaila.test(form.e_mail.value) || (form.e_mail.value.length<=5)) {
                          alert("Please enter valid Your E-mail Address");
                          form.e_mail.focus();
			  			  return false;  
                          } 
 if (form.message.value=="Your Message") {
                          alert("Please enter Your Message");
                          form.message.focus();
                          return false;
                          }						  
 alert("Thank You for sending us E-mail");
 return true
 }