function check_email(e) {
	ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";
	for(i=0; i < e.length ;i++){
		if(ok.indexOf(e.charAt(i))<0){ 
			return (false);
		}
	} 
	if (document.images) {
		re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
		re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
		if (!e.match(re) && e.match(re_two)) {
			return (-1);		
		} 
	}
}

function check_form() {
	if(!check_email(document.contact.email.value)) {
		alert('Please enter your e-mail address');
		document.contact.email.style.backgroundColor='yellow';
		document.contact.email.focus();
		return false;
	} else {
		if(document.contact.message.value=='') {
			alert('Please enter your message');
			document.contact.message.style.backgroundColor='yellow';
			document.contact.message.focus();
			return false;
		} else {
			document.contact.doit.value='Please Wait...';
			document.contact.doit.disabled=true;
			return true;
		}
	}
}