function check_form(form) {
	
	// Contact Form
	if (form.id == "form_contact") {
	
		// Name
		if (form.fullname.value == "") {
			alert("Your name is required. Please fill it in.");
			form.fullname.focus();
			return false;
		}
		
		// E-Mail
		var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
		if (form.email.value == "") {
			alert("Your e-mail address is required. Please fill it in.");
			form.email.focus();
			return false;
		} else if (!form.email.value.match(emailExp)) {
			alert("Your e-mail address is not valid. Please correct it.");
			form.email.focus();
			return false;
		}
		
		// Message
		if (form.message.value == "") {
			alert("Your message is required. Please fill it in.");
			form.message.focus();
			return false;
		}
		
	// Age Verify Form
	} else if (form.id == "form_verify_age") {
	
		// Month
		if (form.month.value == "") {
			alert("A valid month of birth is required. Please fill it in.");
			form.month.focus();
			return false;
		}
		
		// Day
		if (form.day.value == "") {
			alert("A valid day of birth is required. Please fill it in.");
			form.day.focus();
			return false;
		}
		
		// Year
		if (form.year.value == "yyyy" || form.year.value == "" || form.year.value.length != 4) {
			alert("A valid year of birth is required. Please fill it in.");
			form.year.focus();
			return false;
		}
		
		// Age Verification
		var now = new Date();
		var dob = new Date();
		var dobMin = new Date();
		
		dob.setYear(form.year.value);
		dob.setMonth(form.month.value - 1);
		dob.setDate(form.day.value);
		dobMin.setYear(now.getFullYear() - 18);
		
		if (dob.getTime() > dobMin.getTime()) {
			alert("Sorry, you must be 18 years or older to enter this section.");
			return false;
		}
		
		// Set cookie
		document.cookie = "ofage";
		
	// No Form Found
	} else {
		alert("The form \""+form.id+"\" can't be found.");
		return false;
	}
	
	return true;
}