var tempDate;
var article_date;
var msg_art = "Invalid Article Date!";
var msg_start = "Invalid Start Date!";
var msg_expire = "Invalid Expire Date!";
var msg_seq = "Start Date should be earlier than Expire Date!";

function checklength(arg) {
	ok = false;
	for (i=0; i < arg.length; i++){
		if (isNaN(arg.charAt(i)) || (arg.charAt(i)==" ")){						
			return true;
		}else{
			ok = false;
		}
	}
	return ok;
}

function getDate(date,bool){
	var symbol = "/";
	for (i=0; i<date.length; i++){	
		ch = date.substring(i,i+1);
		if ((ch == symbol) && (bool)){
			article_date = article_date.substring(i+1,date.length);
			return date.substring(0,i);
		}else if (!bool){
			return date.substring(0,date.length);
		}
	}
}

function getInv(date,bool,sym){
	for (i=0; i<date.length; i++){	
		ch = date.substring(i,i+1);
		if ((ch == sym) && (bool)){
			tempDate = tempDate.substring(i+1,date.length);
			return date.substring(0,i);
		}else if (!bool){
			return date.substring(0,date.length);
		}
	}
}

function checkDate(strday, strmonth, stryear){
	var dateOK = true;
	if (stryear.length > 0)	{
	 	if ((strday == 31) && (strmonth == 2 || strmonth == 4 || strmonth == 6 || strmonth == 9 || strmonth == 11)){
  			dateOK = false;
	 	}
 		if ((strday == 30) && (strmonth == 2)){
  			 dateOK = false;
	  	}
  		if ((strday == 29) && (strmonth == 2) && (stryear % 4 != 0)){
  			 dateOK = false;
	 	} 	
	}
 	return dateOK;
}

function checkDate2(day1,month1,year1,day2,month2,year2){
	var date1;
        var date2;
	date1 = year1 * 10000 + month1 * 100 + day1;
       	date2 = year2 * 10000 + month2 * 100 + day2;
	return date1 <= date2;
}

function checkAllDate(arg){
	var date_y,date_m,date_d;
	article_date = arg;
	if (article_date.length==0){
		return true;
	}
	date_d = getDate(article_date,true);	
	date_m = getDate(article_date,true);
	date_y = getDate(article_date,false);
	if (!(date_y.length==4)){
		return true;
	}
	if ((date_m < 1) || (date_m > 12)){
		return true;
	}
	if ((date_d < 1) || (date_d > 31)){
		return true;
	}
	if (checklength(date_y) || checklength(date_m) || checklength(date_d)){
		return true;
	}
	if(!checkDate(date_d, date_m, date_y)){		
		return true;
	}
	return false;
}

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) { //v4.0
  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 && document.getElementById) x=document.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];}
}

var myTimer, newsTimer;
var widthOfContainer = heightOfContainer = 0;
var speed = 10;
var newsSpeed = 5;
var maxDisplayWidth = parseInt( $("#siteBanner").css( "width" ) );
var maxDisplayHeight = parseInt( $("#newsList").css( "height" ) );
var showBanner = 'banner_1';

$(document).ready(function(){
	$( ".listTable tr:odd, #listTable tr:odd" ).css( "background-color", "#eaeaea" );
	$( ".listTable tr:even, #listTable tr:even" ).css( "background-color", "#f3f3f3" );

	$("#loginBox").show();
	$("#logoutBox").hide();

	$("#menuLogout").click(function(){
		$("#logoutFrm").submit();
	});

	$("#loginSubmit").hover(function(){
		$(this).attr( "src", $(this).attr( "src" ).replace( ".gif", "_over.gif" ) );
	}, function(){
		$(this).attr( "src", $(this).attr( "src" ).replace( "_over.gif", ".gif" ) );
	});

/*	Start Left Menu Control	*/
	$(".leftMenu .menu").hover(function(){
		name = $(this).attr("id");
		obj = $("#"+name+" div img").offset();
		layerLeft = obj.left + parseInt( $("#"+name+" div img").attr( "width" ) ) - 4;
		layerTop = obj.top;

		$("#"+name+"Sub").css( "left", layerLeft ).css( "top", layerTop );
		$("#"+name+"Sub").show();
	}, function(){
		name = $(this).attr( "id" );
		$("#"+name+"Sub").hide();
	});
/*	End Left Menu Control	*/

/*	Start Banner Control	*/
	$("#container").find( "img" ).each(function(){
		widthOfContainer += parseInt( $(this).css( "width" ) );
	});
	$("#container").css( "width", widthOfContainer );
	$("#siteBanner").show();
	$("#"+showBanner).show();

	$("#bannerLeftButton").click(function(){
		changeBanner( 'left' );
	});

	$("#bannerRightButton").click(function(){
		changeBanner( 'right' );
	});
/*	End Banner Control	*/

/*	Start News List Control	*/
	heightOfContainer = $(".news:last").offset().top-$(".news:first").offset().top;
	$("#newsUpButton").hover(function(){
		if( heightOfContainer > parseInt( $("#newsList").css( "height" ) ) )
			newsScroll( 'up' );
	}, function(){
		clearTimeout( newsTimer );
	});
	
	$("#newsDownButton").hover(function(){
		if( heightOfContainer > parseInt( $("#newsList").css( "height" ) ) )
			newsScroll( 'down' );
	}, function(){
		clearTimeout( newsTimer );
	});
/*	End News List Control	*/

	$("#loginFrm").submit(function(){
		if( $("#user_login").val()=="" ){
			alert( "Please fill in the login name" );
			$("#user_login").focus();
			return false;
		}

		if( $("#user_password").val()=="" ){
			alert( "Please fill in the password" );
			$("#user_login").focus();
			return false;
		}

		return true;
	});

	$("#logoutButton").click(function(){
		$("#logoutFrm").submit();
	});

	for( i=0;i<imageList.length;i++ )
		$("#"+imageList[i]+" .courseImage:eq(0)").show();
	imageTimer = setTimeout( "runTimer()", imageSpeed );
});

function changeLang( lang ){
	$("#lang").val( lang );
	$("#langFrm").submit();
}

function runTimer(){
	for( i=0;i<imageList.length;i++ ){
		nextShow = parseInt( $("#"+imageList[i]+" .courseImage:visible").next().attr("id") );
		if( isNaN(nextShow) ){ nextShow=0; }
		$("#"+imageList[i]+" .courseImage").hide();
		$("#"+imageList[i]+" .courseImage:eq("+nextShow+")").show();
	}
	imageTimer = setTimeout( "runTimer()", imageSpeed );
}

function newsScroll( direction ){
	curTop = parseInt( $("#newsContainer").css( "top" ) );
	if( direction=="up" ){
		nextTop = curTop + newsSpeed;
		if( nextTop < 0 )
			$("#newsContainer").css( "top", nextTop+"px" );
		else
			$("#newsContainer").css( "top", "0px" );
	}else{
		nextTop = curTop - newsSpeed;
		maxTop = -heightOfContainer + maxDisplayHeight;
		if( nextTop >= maxTop )
			$("#newsContainer").css( "top", nextTop+"px" );
		else
			$("#newsContainer").css( "top", maxTop+"px" );
	}
	newsTimer = setTimeout( "newsScroll('"+direction+"')", 100 );
}

function changeBanner( direction ){
	if( direction=="left" ){
		if( showBanner!="banner_1" ){
			$("#"+showBanner).fadeOut( "slow" );
			showBanner = $("#"+showBanner).prev().attr("id");
			$("#"+showBanner).fadeIn( "slow" );
		}
	}else{
		num = $("#container").children().size();
		if( showBanner!="banner_"+num ){
			$("#"+showBanner).fadeOut();
			showBanner = $("#"+showBanner).next().attr("id");
			$("#"+showBanner).fadeIn();
		}
	}
}

function echeck(str) {
	var pattern=/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;
	if( !pattern.test( str ) ){         
		return false;
	}

	findDot = str.indexOf( ".", 0 );
	while( findDot!=-1 ){
		nextDot = str.indexOf( ".", findDot+1 );
		if( nextDot==findDot+1 )
			return false;
		findDot = nextDot;
	}
	return true
}