function check_form_contact() {
	var name = document.mail_form.name.value;
	if (name == "") {
		alert('Provide your name please!');
		return false;
		}else{
		var email = document.mail_form.email.value;
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (!(filter.test(email))) {
			alert('Provide valid email please!');
			return false;
			}else{
			var message = document.mail_form.message.value;
			if (message == "") {
				alert('Type your message please!');
				return false;
				}else{
				var strIMG = document.mail_form.strIMG.value;
				var isInteger  = /^[0-9]+$/;
				if (!(isInteger.test(strIMG) && strIMG.length == 6)) {
					alert('Invalid security code!');
					return false;
					}else{
					return true;
				}
			}
		}
					
	}
}
function check_form_status() {
	var idorder = document.statusform.idorder.value;
	var isInteger  = /^[0-9]+$/;
	if (!(isInteger.test(idorder) && idorder.length == 6)) {
		alert ('Provide valid order number!');
		return false;
		}else{
		var email = document.statusform.email.value;
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (!(filter.test(email))) {
			alert('Provide valid email!');
			return false;
			}else{
			return true;
		}
	}
}
function check_form_friend() {
	var name = document.friend_form.name.value;
	if (name == "") {
		alert('Provide your name please!');
		return false;
		}else{
		var email = document.friend_form.email.value;
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (!(filter.test(email))) {
			alert('Provide valid email please!');
			return false;
			}else{
			var fname = document.friend_form.fname.value;
			if (fname == "") {
				alert('Provide friend\'s name please!');
				return false;
				}else{
				var femail = document.friend_form.femail.value;
				if (!(filter.test(femail))) {
					alert('Provide friend\'s valid email please!');
					return false;
					}else{
					var message = document.friend_form.message.value;
					if (message == "") {
						alert('Type your message please!');
						return false;
						}else{
						var strIMG = document.friend_form.strIMG.value;
						var isInteger  = /^[0-9]+$/;
						if (!(isInteger.test(strIMG) && strIMG.length == 6)) {
							alert ('Invalid security code!');
							return false;
							}else{
							return true;
						}
					}	
				}
			}
		}			
	}
}
function check_vote() {
	var radio_choice = false;
	for (counter = 0; counter < document.frm_vote.poll_a.length; counter++) 	{
		if (document.frm_vote.poll_a[counter].checked) {
			radio_choice = true; 
		}
	}
	if (!radio_choice) {
		alert ('Select an answer please.');
		return false;
	}
}