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(theform) {
	if(theform.yourname.value=='') {
		alert('Sorry! There seems to be a problem.\nPlease can you enter your name.');
		theform.yourname.style.backgroundColor='yellow';
		theform.yourname.focus();
		return false;
	} else {
		if(!check_email(theform.email.value)) {
			alert('Sorry! There seems to be a problem.\nPlease can you enter a valid e-mail address.');
			theform.email.style.backgroundColor='yellow';
			theform.email.focus();
			return false;
		} else {
			if(theform.comment.value == '') {
				alert('Sorry! There seems to be a problem.\nPlease can you enter your comment.');
				theform.comment.style.backgroundColor='yellow';
				theform.comment.focus();
				return false;
			} else {
				if(theform.captchatext.value=='') {
					alert('Sorry! There seems to be a problem.\nPlease can you answer the question.');
					theform.captchatext.style.backgroundColor='yellow';
					theform.captchatext.focus();
					return false;
				} else {
					theform.doit.value='Please Wait...';
					theform.doit.disabled=true;
					return true;
				}
			}
		}
	}
}