function mran(ma, mi) {
	return (Math.round(Math.random() * (ma - mi)) + mi)
}

var Slideshow = Class.create( {
	initialize : function(delay, totalElmt, elmtName, pulse) {
		this.delay = delay;
		this.totalElmt = totalElmt;
		this.paused = 0;
		this.arrSlideElmt = [ totalElmt ];
		this.curElmtNum = mran(totalElmt, 1); //randomize first element
	this.pulse = pulse;

	//preload all elements into array and preload all images within element
	for (i = 1; i <= totalElmt; i++) {
		this.arrSlideElmt[i] = $(elmtName + i);
		this.arrSlideElmt[i].observe('mouseover', function() {
			this.paused = 1;
		}.bind(this)); //pause on mouseover
		this.arrSlideElmt[i].observe('mouseout', function() {
			this.paused = 0;
		}.bind(this)); //resume on mouseout
		$$(this.arrSlideElmt[i].img).each(function(img) {
			img = new Image();
		});
	}
	$$('a.next_sshow').each(function(node) {
		node.observe('click', function(s) {
			this.arrSlideElmt[this.curElmtNum].setStyle( {
				display : 'none'
			});
			this.checkSlide();

			this.arrSlideElmt[this.curElmtNum].setStyle( {
				display : 'block'
			});
			s.stop();
		}.bind(this));

	}.bind(this));

	$$('a.prev_sshow').each(function(node) {
		node.observe('click', function(s) {
			this.arrSlideElmt[this.curElmtNum].setStyle( {
				display : 'none'
			});

			if (this.curElmtNum == 1) {
				this.curElmtNum = this.totalElmt
			} else {
				this.curElmtNum = this.curElmtNum - 1
			}
			//this.checkSlide();

				this.arrSlideElmt[this.curElmtNum].setStyle( {
					display : 'block'
				});
				s.stop();
			}.bind(this));

	}.bind(this));
},
start : function() {
	//show first element without effect
	this.arrSlideElmt[this.curElmtNum].setStyle( {
		display : 'block'
	});
	if (this.pulse) {
		this.executor = new PeriodicalExecuter(function() {
			this.next(); //start slidehow
			}.bind(this), this.delay);
	}
},

next : function() {
	if (!this.paused) {
		this.update();
	}
},
update : function() {
	new Effect.Fade(this.arrSlideElmt[this.curElmtNum], {
		afterFinish : function() {
			this.checkSlide();
			new Effect.Appear(this.arrSlideElmt[this.curElmtNum]);
		}.bind(this)
	});
},
checkSlide : function() {
	if (this.curElmtNum == this.totalElmt) {
		this.curElmtNum = 1;
	} else {
		this.curElmtNum++;
	}
}
});