/*
	Standards Compliant Rollover Script
	Author : Daniel Nolan
	http://www.bleedingego.co.uk/webdev.php
*/

function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_o'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_o'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;

/* crossfade */ 

new function(){
  function setRollOver2(){
    if(!document.images){return;}
    var imgs = document.images;
    var insert = [];
    for(var i=0;i<imgs.length;i++){
      var splitname = imgs[i].src.split('_btn.');
      if((splitname[1])&&(imgs[i].parentNode.tagName=='A')){
        var rolloverImg = document.createElement('img');
        rolloverImg.src = splitname[0]+'_btn_f2.'+splitname[1];
        var alpha = 0;
        rolloverImg.currentAlpha = alpha;
        rolloverImg.style.opacity = alpha/100;
        rolloverImg.style.filter = 'alpha(opacity='+alpha+')';
        rolloverImg.style.position = 'absolute';


        addEvent(rolloverImg,'mouseover',function(){setFader(this,100);});
        addEvent(rolloverImg,'mouseout',function(){setFader(this,0);});

        insert[insert.length] = {position:imgs[i],element:rolloverImg};
      }
    }
    for(var i=0;i<insert.length;i++){
      var parent = insert[i].position.parentNode;
      parent.insertBefore(insert[i].element,insert[i].position);
    }
  }


  function setFader(targetObj,targetAlpha){
    targetObj.targetAlpha = targetAlpha;
    if(targetObj.currentAlpha==undefined){
      targetObj.currentAlpha = 100;
    }
    if(targetObj.currentAlpha==targetObj.targetAlpha){
      return;
    }
    if(!targetObj.fading){
      if(!targetObj.fader){
        targetObj.fader = fader;
      }
      targetObj.fading = true;
      targetObj.fader();
    }
  }

  function fader(){
    this.currentAlpha += (this.targetAlpha - this.currentAlpha)*0.2;
    if(Math.abs(this.currentAlpha-this.targetAlpha)<1){
      this.currentAlpha = this.targetAlpha;
      this.fading = false;
    }
    var alpha = parseInt(this.currentAlpha);
    this.style.opacity = alpha/100;
    this.style.filter = 'alpha(opacity='+alpha+')';
    if(this.fading){
      var scope = this;
      setTimeout(function(){fader.apply(scope)},40);
    }
  }

  function addEvent(eventTarget, eventName, func){
    if(eventTarget.addEventListener){
      eventTarget.addEventListener(eventName, func, false);
    }else if(window.attachEvent){
      // IE
      eventTarget.attachEvent('on'+eventName, function(){func.apply(eventTarget);});
    }
  }

  addEvent(window,'load',setRollOver2);

}