function hideLayer(layp) {
 var layerhv = document.getElementById(layp);
	if (document.layers)
	{
		current = (layerhv.display == 'none') ? 'block' : 'none';
		layerhv.display = current;
	}
	else if (document.all)
	{
		current = (layerhv.style.display == 'none') ? 'block' : 'none';
		layerhv.style.display = current;
	}
	else if (document.getElementById)
	{
		vista = (layerhv.style.display == 'none') ? 'block' : 'none';
		layerhv.style.display = vista;
	}
}

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_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_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 validfrmAddedit() {

	var addedFrm = document.frmAddedit;
	var inalbum = addedFrm.albumcode;
	var intitle = addedFrm.songtitle;
	var incontent = addedFrm.lyric_content;
	var incheck = addedFrm.checker;
			
	if (inalbum.value == "") {

		alert('Please select an album for the song.');
		inalbum.focus();
		incheck.value = 0;
		return false;

	}
	else if (intitle.value == "") {

		alert('Please input a title for the song.');
		intitle.focus();
		incheck.value = 0;
		return false;

	}
	else if (incontent.value == "") {

		alert('Please input lyrics for the song.');
		incontent.focus();
		incheck.value = 0;
		return false;

	}
	else {
	
		incheck.value = 1;
		return true;
	
	}

}

function validRegister(){
	myform = document.frmRegister
	fn = myform.firstname
	mn = myform.mname
	ln = myform.lastname
	un = myform.reguser
	fp = myform.regpass
	chk = myform.checker
	
	if (fn.value==""){
		alert('Firstname required!')
		fn.focus()
		chk.value = 0
		return false
	}
	else if (mn.value==""){
		alert('Middlename required!')
		mn.focus()
		chk.value = 0
		return false
	}
	else if (ln.value==""){
		alert('Lastname required!')
		ln.focus()
		chk.value = 0
		return false
	}
	else if (un.value==""){
		alert('Please supply a username for your account!')
		un.focus()
		chk.value = 0
		return false
	}
	else if (fp.value==""){
		alert('Please supply a password for your account!')
		fp.focus()
		chk.value = 0
		return false
	}
	else{
		chk.value = 1
		return true
	}
}
function validLog(){
	myform = document.frmLogin
	un = myform.username
	fp = myform.fpass
	chk = myform.checker
	
	if (un.value==""){
		alert('Please input a username!')
		un.focus()
		chk.value = 0
		return false
	}
	else if (fp.value==""){
		alert('Please input a password!')
		fp.focus()
		chk.value = 0
		return false
	}
	else{
		chk.value = 1
		return true
	}
}

function validfrmRequest() {

	var addedFrm = document.frmRequestLyric;
	var inartist = addedFrm.artistname;
	var inalbum = addedFrm.albumname;
	var intitle = addedFrm.songtitle;
	var incheck = addedFrm.checker;
			
	if (inartist.value == "") {

		alert('Please specify the artist of the song.');
		inartist.focus();
		incheck.value = 0;
		return false;

	}
	else if (intitle.value == "") {

		alert('Please specify the title of the song.');
		intitle.focus();
		incheck.value = 0;
		return false;

	}
	else {
	
		incheck.value = 1;
		return true;
	
	}

}

function validSearch() {

	var sform = document.searchFrm;
	var intable = sform.table;
	var insearch_txt = sform.search_txt;
			
	if (intable.value == "") {

		alert('Please choose among search category.');
		intable.focus();
		return false;

	}
	else if (insearch_txt.value == "") {

		alert('Please specify search term.');
		insearch_txt.focus();
		return false;

	}
	else {
	
		return true;
	
	}

}

function openwin(message){
	window.open("message");
}