function checkform()
{
	if(document.form1.customername.value.length==0){
		alert("Your contact name can't be blank!");
		document.form1.customername.focus();
		return false;
	}
	if(document.form1.customeremail.value.length==0){
		alert("E-mail can't be blank!");
		document.form1.customeremail.focus();
		return false;
	}
	if(document.form1.bbstitle.value.length==0){
		alert("The title of the guestbook can't be blank!");
		document.form1.bbstitle.focus();
		return false;
	}
	if(document.form1.bbscontent.value.length==0){
		alert("Comment can't be blank!");
		document.form1.bbscontent.focus();
		return false;
	}
	return true;
	
}