/* rollover */
rolloverconf = {
       className : 'rollover',
       postfix : '_over'
};
function setMouseOverImages() {
			$A(document.getElementsByClassName(rolloverconf.className)).each(function (node){
				node.onmouseout = changeSrcFunction(node.src);
				node.onmouseover = changeSrcFunction(node.src.replace(/(\.gif|\.jpg|\.png)/, rolloverconf.postfix+"$1"));
			});
}
function changeSrcFunction(data){
       return function(){ this.src = data; }
}
Event.observe(window, 'load', setMouseOverImages, false);


/* gotop */
gotopconf = {
       className : 'backToTopLink'
};
function setBackToTop() {
			$A(document.getElementsByClassName(gotopconf.className)).each(function (node){
				Event.observe(node, 'click', backToTop, false);
			});
}
function backToTop() {
    var x1 = x2 = x3 = 0;
    var y1 = y2 = y3 = 0;

    if (document.documentElement) {
        x1 = document.documentElement.scrollLeft || 0;
        y1 = document.documentElement.scrollTop || 0;
    }

    if (document.body) {
        x2 = document.body.scrollLeft || 0;
        y2 = document.body.scrollTop || 0;
    }

    x3 = window.scrollX || 0;
    y3 = window.scrollY || 0;

    var x = Math.max(x1, Math.max(x2, x3));
    var y = Math.max(y1, Math.max(y2, y3));

    window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));

    if (x > 0 || y > 0) {
        window.setTimeout("backToTop()", 25);
    }

}
Event.observe(window, 'load', setBackToTop, false);


/* externalLink */
function externalLinks() {
  if (!document.getElementsByTagName) return;
  var anchors = document.getElementsByTagName("a");
  for (var i=0; i<anchors.length; i++) {
    var anchor = anchors[i];
    if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
      anchor.target = "_blank";
  }
}
Event.observe(window, 'load', externalLinks, false);