var colorOriginal="";
var imgOriginal="";
var styleOriginal="";

function g_swapStyle(elementId, targetStyle) {
	this.styleOriginal = elementId.className;
	elementId.className = targetStyle;
}

function g_swapStyleRestore(elementId) {
	elementId.className = this.styleOriginal;
}

function g_swapBGImg(elementId, targetImg) {
	this.imgOriginal = elementId.style.backgroundImage;
	elementId.style.background = "url("+targetImg+")";
}

function g_swapBGImgRestore(elementId) {
	elementId.style.backgroundImage = this.imgOriginal;
}

function g_swapBGColor(elementId, targetColor) {
	this.colorOriginal = document.getElementById(elementId).style.backgroundColor;
	document.getElementById(elementId).style.backgroundColor = targetColor;
}

function g_swapBGColorRestore(elementId) {
	document.getElementById(elementId).style.backgroundColor = this.colorOriginal;
}

function changeBgColor(elementId, color){
	document.getElementById(elementId).style.backgroundColor = color;
}

function changeColor(elementId, color){
	document.getElementById(elementId).style.color = color;
}

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];
   }
}

String.prototype.Trim = function() { 
	return this.replace(/(^\s*)|(\s*$)/g, ""); 
} 

function chr( codePt ) {    
    if (codePt > 0xFFFF) {
        codePt -= 0x10000;
        return String.fromCharCode(0xD800 + (codePt >> 10), 0xDC00 + (codePt & 0x3FF));
    }
    else {
        return String.fromCharCode(codePt);
    }
}

function resetTab() {
	for(var i=1; i<=5; i++) {
		g_swapBGImg(document.getElementById('indexTab'+i), 'images/main/newsbtn'+chr(i+96)+'.jpg');
		g_swapStyle(document.getElementById('indexTab'+i),'font01_newsgray');
		document.getElementById('indexTabContent'+i).style.display = 'none';
	}
}

function swapNews(tabIdx, thisObj) {
	/*var evt=window.event || e;
	//var el = e.target || e.srcElement;
	var thisObj = evt.target || evt.srcElement;*/
	resetTab();
	g_swapBGImg(thisObj, 'images/main/newsbtn'+chr(parseInt(tabIdx)+96)+'02.jpg');g_swapStyle(thisObj,'font01_news');
	document.getElementById('indexTabContent'+tabIdx).style.display = 'inline';
}