function overlay(el, t, title){
	op=(t)?0.99:0.0;
	Element.setOpacity(el, op);
	$("cattitle").innerHTML=title;
}
function startG(linkId){gallery.start($(linkId));}

 function TextScroll(scrollname, div_name, up_name, down_name)
	{
	    this.div_name = div_name;
	    this.name = scrollname;
	    this.scrollCursor = 0;
	    this.speed = 5;
	    this.timeoutID = 0;
	    this.div_obj = null;
	    this.up_name = up_name;
	    this.dn_name = down_name;
	
	{
      div_obj = $(this.div_name);
      if (div_obj) {
          this.div_obj = div_obj;
          this.div_obj.style.overflow = 'hidden';
      }
      div_up_obj = $(this.up_name);
      div_dn_obj = $(this.dn_name);
      if (div_up_obj && div_dn_obj) {   
        div_up_obj.onmouseover = function() { eval(scrollname + ".scrollUp();") };
				div_up_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
				
				div_dn_obj.onmouseover = function() { eval(scrollname + ".scrollDown();") };
				div_dn_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
      }
	       
	}
	
	this.stopScroll = function() { clearTimeout(this.timeoutID); }
	
	this.scrollUp = function() {
	        if (this.div_obj) {
	            this.scrollCursor = (this.scrollCursor - this.speed) < 0 ? 0 : this.scrollCursor - this.speed;
	            this.div_obj.scrollTop = this.scrollCursor;
	            this.timeoutID = setTimeout(this.name + ".scrollUp()", 25);
	        }
	    }
	    
	this.scrollDown = function() {
		if (this.div_obj) {
			this.scrollCursor += this.speed;
			this.div_obj.scrollTop = this.scrollCursor;
			if (this.div_obj.scrollTop == this.scrollCursor) {
				this.timeoutID = setTimeout(this.name + '.scrollDown()', 25);
			} else {
					this.scrollCursor = this.div_obj.scrollTop;
			}
		}
	}
	
	this.resetScroll = function() {
      if (this.div_obj) {
          this.div_obj.scrollTop = 0;
          this.scrollCursor = 0;
      }
  }
}