//焦点大图相关js
var c_img_index = 1;
var img_interval = setInterval("change_image()",3000);

//焦点大图核心函数
function change_image(img_index,pic_num){
    if(pic_num>1){
	var temp_index = 0;
	var img_o_arr = document.getElementById("focus_id").getElementsByTagName("a");
	var num_o_arr = document.getElementById("focus_num").getElementsByTagName("span");
	if (typeof img_index=="undefined") {
		img_index = 0;
		temp_index = c_img_index;
		if (c_img_index ==img_num) c_img_index=1;
		else c_img_index = c_img_index+1;
	}else if (parseInt(img_index)){
		if (img_index == c_img_index) return false;
		clearInterval(img_interval);
		temp_index = c_img_index;
		c_img_index = img_index;
	}
	
    img_o_arr[c_img_index-1].style.display="";
    img_o_arr[temp_index-1].style.display="none";
    num_o_arr[c_img_index-1].className="now";
    num_o_arr[temp_index-1].className="";
    if (parseInt(img_index)){
    	img_interval = setInterval("change_image()",3000);
    }
}
}