var Rollover = function () {};

Rollover.suffix = '_over';
Rollover.preloadimages = [];
Rollover.overflag = [];

Rollover.overimage = function (obj) {
	if (obj.src && obj.src.indexOf('.') != -1) {
		obj.src = Rollover.getrolloverimagefile(obj.src);
		this.overflag.push(obj);
	}
}
	
Rollover.normalimage = function (obj) {
	var flag = false;
	for (var i in this.overflag) {
		if (this.overflag[i] == obj) {
			flag = true;
			this.overflag[i] = null;
			break;
		}
	}
	if (flag && obj.src && obj.src.indexOf('.') != -1) {
		obj.src = Rollover.getoriginalimagefile(obj.src);
	}
}
	
Rollover.getrolloverimagefile = function (path) {
	var filename = path.substring(0, path.lastIndexOf('.'));
	var extention = path.substring(path.lastIndexOf('.'), path.length);
	return filename + Rollover.suffix + extention;
}
	
Rollover.getoriginalimagefile = function (path) {
	var filename = path.substring(0, path.lastIndexOf('.')-Rollover.suffix.length);
	var extention = path.substring(path.lastIndexOf('.'), path.length);
	return filename + extention;
}

Rollover.initrolloverimages = function() {
	var images = document.getElementsByTagName('img');
	for (var i=0; i<images.length; i++) {
		var classValue = null;
		if (images[i].getAttribute('className'))
			classValue = images[i].getAttribute('className');
		else if (images[i].getAttribute('class'))
			classValue = images[i].getAttribute('class');
		if (classValue != null && classValue.indexOf('rollover') != -1 && images[i].src) {
			images[i].onmouseover = function() {
				Rollover.overimage(this);
			};
			images[i].onmouseout = function() {
				Rollover.normalimage(this);
			};
			Rollover.preloadimages[i] = new Image();
			Rollover.preloadimages[i].src = Rollover.getrolloverimagefile(images[i].src);
		}
	}
};


var PopupWindow = function() {};

PopupWindow.popupwindow = null;

PopupWindow.popup = function(url, width, height) {

	var left = (screen.width - width) / 2;
	var top =  (screen.height - height) / 2;
	
	if (this.popupwindow && !this.popupwindow.closed) {
		this.popupwindow.close();
	}
	
	var option = 'scrollbars=no,resizable=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top+'';
	this.popupwindow = window.open(url, 'popupwindow', option);
};

function addLoadEvent(func) {
	var old_onload = window.onload;
	if (typeof window.onload != 'function') {
    	window.onload = func;
	} else {
		window.onload = function() {
			old_onload();
			func();
		}
	}
}

addLoadEvent(Rollover.initrolloverimages);



var scrj = 1;
function pageTop() {
   if(navigator.appName == "Microsoft Internet Explorer" && document.compatMode == "CSS1Compat") {
      var scdist = document.body.parentNode.scrollTop;
   } else {
      var scdist = document.body.scrollTop;
   }
   if(scrj<50 && scdist) {
      scdist = (scdist>2) ? Math.ceil(scdist*.2) : 1;
      scrj++;
      scrollBy(0,-scdist);
      setTimeout("pageTop()",20);
   } else {
      scrollTo(0,0);
      scrj = 1;
   }
}