function getParameter(name){
    var search = document.location.search;
    var pattern = new RegExp("[?&]"+name+"\=([^&]+)", "g");
    var matcher = pattern.exec(search);
    var items = null;
    if(null != matcher){
        items = decodeURIComponent(matcher[1]);
    }
    return items;
}


/*ppp add*/
var B=BigNews={
	current:0,
	next:0,
	scrollInterval:0,
	autoScroller:0
};
BigNews.turn=function(index){
	clearInterval(BigNews.autoScroller);
	BigNews.scroll(index);
}
BigNews.scroll=function(index){
	if(!$('ul_big_news_item')){
		clearInterval(BigNews.autoScroller);
		return;
	}
	var count=0;
	var step=180;
	var duration=16;
	var b=BigNews;
	b.next=index;
	if(index!=b.current&&count>duration/8){
		return;
	}
	clearInterval(b.scrollInterval);
	var items=$('ul_big_news_item').getElementsByTagName('li');
	for(var i=0;i<4;i++){//头条新闻条数
		items[i].className='';
	}
	items[index].className='up';
	var span=index-b.current;
	var begin_value=$('div_big_news_img').scrollTop;
	var chang_in_value=span*step+(b.current*step-begin_value);
	b.scrollInterval=setInterval(function(){doit(begin_value,chang_in_value)},10);
	function doit(b,c){
		$('div_big_news_img').scrollTop=cpu(count,b,c,duration);
		count++;
		if(count==duration){
			clearInterval(BigNews.scrollInterval);
			scrollInterval=0;
			count=0;
			$('div_big_news_img').scrollTop=b+c;
			BigNews.current=index;
		}
	}
	function cpu(t,b,c,d) {return c*((t=t/d-1)*t*t+1)+b;};
}
BigNews.auto=function(){
	clearInterval(BigNews.autoScroller);
	BigNews.autoScroller=setInterval(function(){
		BigNews.scroll(BigNews.current==3?0:BigNews.current+1);
	},5000);
}
window.attachEvent('onload',BigNews.auto);

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