function getElementsByClass(etype, className){
	var	result = [],
		re = new RegExp("(^|\\s)" + className + "(\\s|$)"),
		elements = document.getElementsByTagName(etype),
		i = elements.length;
	while(i--) {
		if(re.test(elements[i].className))
			result.push(elements[i]);
	};
	result.reverse();
	return result;
};




var pagenumber=0;
var page=0;
var pages;

function check_button_next(){
	switch(page){
		case pagenumber-1:
			bytefx.fade(document.getElementById('action_prev'),0,100,20);
			break;
		case 0:
			bytefx.fade(document.getElementById('action_next'),100,0,20);
			break;
	}
}

function check_button_prev(){
	switch(page){
		case pagenumber:
			bytefx.fade(document.getElementById('action_prev'),100,0,20);
			break;
		case 1:
			bytefx.fade(document.getElementById('action_next'),0,100,20);
			donot=false;
			break;
	}
}


if((window.opera && window.opera.version() > 7) || !/msie 5.0|msie 4/i.test(navigator.userAgent)) {
	bytefx.$event(window, "onload", function() {
			
			pages=getElementsByClass('LI','pages');
			pagenumber = pages.length-1;
			page = pagenumber;
			bytefx.alpha(document.getElementById('action_prev'),0);
			//next
			bytefx.$event(document.getElementById('action_next'), "onclick", function(){
					if (page>0){
						bytefx.size(pages[page],{width:0,height:347},10);
						page--;
						check_button_next();
					}
			});
			//prev
			bytefx.$event(document.getElementById('action_prev'), "onclick", function(){
					if (page<pagenumber){
						page++;
						bytefx.size(pages[page],{width:795,height:347},10);
						check_button_prev();
					}
			});
			
			document.getElementById('pagebox').className='noborder';
			document.getElementById('box').className='show';			
			
	});
}