// js form checks by Adam @ QuizHeaven.com ... 9/2006
// If you steal this .. at least leave the comment.  For posterity, that is.

function validate_form(TheForm) {
    for ( x = 0; x <= TheForm.length; x++ ) {
        if (TheForm.elements[x].name == "opt_question") continue; // skip the optional question.  blank = ignore.
        if (TheForm.elements[x].name.substr(0,6) == "image_") {
            if ( TheForm.elements[x].value.length >= 1 ) {

                var val = TheForm.elements[x].value;
                var str = val.toLowerCase();
                if (    (str.substr(val.length - 5, 5) != ".jpeg")
                    &&  (str.substr(val.length - 4, 4) != ".jpg")
                    &&  (str.substr(val.length - 4, 4) != ".gif")
                    &&  (str.substr(val.length - 4, 4) != ".png") ) {
                        alert("Must be JPEG/JPG, GIF or PNG format." );
                        TheForm.elements[x].focus();
                        return false;
                }
            }
            else {
                continue; // skip the blank image url spots
            }
        }
        if (TheForm.elements[x].value.length == 0) {
            alert("You missed a spot!");
            TheForm.elements[x].focus();
            return false;
        }
    }
    return true;
} // end validate_form func

function fix_num(object) {
	if ( isNaN(object.value) ) {
        alert("Value must be a number!");
		object.focus();
		object.select();
		return false;
    }
    return true;
}

function confirm_flag(TheForm) {
	var result;
	result = window.confirm("Are you SURE you want to flag this quiz?");
	if ( result == true )
		document.flagquizform.submit();
	return result;
}

function ismaxlength(obj){
// don't remember where this came from.  thanks, intarweb!
var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : ""
if (obj.getAttribute && obj.value.length>mlength)
obj.value=obj.value.substring(0,mlength)
}

function validate_emailform(TheForm) {
	for ( x = 0; x <= TheForm.length; x++ ) {
		if ((TheForm.elements[x].name.substr(0,15) == "email_recipient") || (TheForm.elements[x].name.substr(0,12) == "email_sender") ) {
			var goodEmail = false
			if ( TheForm.elements[x].value.length == 0 ) continue
			if ( TheForm.elements[x].value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi) ) {
				goodEmail = true
			}
			if ( goodEmail == false ) {
				alert("Invalid Email Address.");
				TheForm.elements[x].focus();
				TheForm.elements[x].select();
				return false;
			}
		}
	}
	return true
}

function validate_email(TheForm) {
	var goodEmail = false;
	if ( TheForm.emailaddress.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi) ) {
		goodEmail = true
	}

	if ( goodEmail == false ) {
		alert("Invalid Email Address");
		TheForm.emailaddress.focus();
		TheForm.emailaddress.select();
		return false;
	}

	return goodEmail;
}

function ConfirmDelQuiz() {
	var confirmation = confirm("Are you SURE you want to delete the selected quizzes?");
	if ( confirmation ) return true;
	return false;
}