function checkForm() {
	re = /^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w][^_]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/;
	fname = document.Form1.Sender_Name;
	eml = document.Form1.sender_address;
	if(fname.value == "") { alert("Please enter your Name."); fname.focus();
	} else if (eml.value == "") { alert("Please enter your Email Address."); eml.focus();
	} else if (! re.test(eml.value)) { alert("Sorry, but \"" + eml.value + "\" is an invalid Email Address!"); eml.focus();
	} else { document.Form1.submit();
	}
}