// JavaScript Document

function toggle(id) {
	if (document.getElementById(id).style.display == "") {
		show = "none";
	}
	else {
		show = "";
	}
	document.getElementById(id).style.display = show;
}

function changeStyle(el, cls) {
	el.className = cls;
}

function getURL(path, target) {
	if (target == null) {
		location.href = path;
	} else if (target == "blank") {
		window.open(path);
	} else if (target == "parent") {
		parent.location.href = path;
	} else if (target == "self") {
		location.href = path;
	}
}


function jumpMenu(targ, selObj, restore) {
	if (selObj.options[selObj.selectedIndex].value) {
		eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
	}
	if (restore) selObj.selectedIndex=0;
}

function checkForm() {
	var gname, gemail, gurl, gmessage;
	with(window.document.guestform) {
		gname    = txtNameX;
		gemail   = txtEmailX;
		gurl     = txtUrlX;
		gmessage = mtxMessageX;
	}
	if (gname.value == ' name') {
		alert('Please enter your name');
		gname.focus();
		return false;
	}
	else if (gemail.value != ' e-mail' && !isEmail(trim(gemail.value))) {
		alert('Please enter a valid e-mail address or leave it blank');
		gemail.focus();
		return false;
	}
	else if (gmessage.value == ' message') {
		alert('Please enter your message');
		gmessage.focus();
		return false;
	} else {
		return true;
	}
}

function clearForm() {
	var gname, gemail, gurl, gmessage;
	with(window.document.guestform) {
		gname    = txtNameX;
		gemail   = txtEmailX;
		gurl     = txtUrlX;
		gmessage = mtxMessageX;
	}
	gname.value = ' name';
	gemail.value = ' e-mail';
	gurl.value = ' website';
	gmessage.value = ' message';
}

function registerForm() {
	var gregister;
	with(window.document.formRegister) {
		gregister = emailRegister;
	}
	if (!isEmail(trim(gregister.value))) {
		alert('Please enter a valid e-mail address');
		gregister.focus();
		return false;
	} else {
		return true;
	}
}

function trim(str) {
	return str.replace(/^\s+|\s+$/g,'');
}

function isEmail(str) {
	var regex = /^[-_.a-z0-9]+@(([-a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
	return regex.test(str);
}

function add() {
	var gtitle, gtext;
	with(window.document.addform) {
		gtitle = txtTitle;
		gtext = mtxText;
	}
	if (gtitle.value == '') {
		alert('Enter title');
		gtitle.focus();
		return false;
	}
	else if (gtext.value == '') {
		alert('Enter tracklist');
		gtext.focus();
		return false;
	} else {
		return true;
	}
}