var audio_popup = '';
var lyrics_popup = '';

function MM_swapImgRestore() { //v3.0
	var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
	var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
	var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
	var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function popup(url,w,h,t,l,name,s) {
	var pop_name = name == void 0 ? '' : name;
	s = s == void 0 ? ',scrollbars=1' : '';  // default is scrollbars
	var pops = window.open(url, pop_name, 'top='+t+',left='+l+',width='+w+',height='+h+s);
	return pops;
}

function show_audio(file) {
	audio_popup = popup(file,275,120,0,0,'player',1);
	if (lyrics_popup != '') lyrics_popup.focus();
	audio_popup.focus();
}

function show_lyrics(songid) {
	lyrics_popup = popup('popup_lyrics.php?songid=' + songid,400,500,180,0,'lyrics');
	if (audio_popup != '') audio_popup.focus();
	lyrics_popup.focus();
}
function show_lyrics2(songid) {
	lyrics_popup = popup('popup_lyrics.php?songid=' + songid,400,500,0,0,'lyrics');
	if (audio_popup != '') audio_popup.focus();
	lyrics_popup.focus();
}

function reset_field(x, default_value) {
	if (x.value == default_value) {
		x.value = '';
		x.style.color = '#000000';
	}
}

function reset_default(x, default_value) {
	if (x.value == '') {
		x.style.color = '#AEAEAE';
		x.value = default_value;
	}
}

function isEmailAddr(email) {
	if (email.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1) return true;
	else return false;
}

function validateMailingList(theForm) {
	if (theForm.email.value == '' || theForm.email.value == 'email' || !isEmailAddr(theForm.email.value)) {
		alert('Please enter a valid email address.');
		theForm.email.focus();
		return false;
	}
	return true;
}

function validateContact(theForm) {
	if (theForm.name.value == '') {
		alert('Please enter your name.');
		theForm.name.focus();
		return false;
	}
	else if (!isEmailAddr(theForm.email.value)) {
		alert('Please enter a valid email address.');
		theForm.email.focus();
		return false;
	}
	else if (theForm.subject.value == '') {
		alert('Please enter the topic of your message.');
		theForm.subject.focus();
		return false;
	}
	else if (theForm.message.value == '') {
		alert('Please enter your message.');
		theForm.message.focus();
		return false;
	}
	return true;
}