function p$(string){ 
	document.write(string); 
} 
function $(id){ 
	return document.getElementById(id); 
} 
function change_menu(id,content_id,num,total_ztc_menu,menu_on,menu_off){ 
	for (var i=1;i<=total_ztc_menu;i++){ 
		$(id+i).className=menu_off; 
		$(content_id+i).style.display='none'; 
	} 
	$(id+num).className=menu_on; 
	$(content_id+num).style.display='block'; 
}

function change(){ 
	$('f_img').src=imgUrl[now]; 
	$('f_img').alt=imgAlt[now]; 
	for (var i=0;i<count;i++) { 
		$('b'+i).className="button"; 
	} 
	$('b'+now).className="on";     
	now=(now>=imgUrl.length-1)?0:now+1; 
} 
function b_change(num){ 
	window.clearInterval(theTimer);
	now=num;
	$('f_img').src=imgUrl[now];
	$('f_img').alt=imgAlt[now];
	for (var i=0;i<count;i++) {
		$('b'+i).className="button";
	}
	$('b'+now).className="on";
	theTimer = setInterval("change()", _timeOut_); 
} 
//draw 渐变line （即css:f_line) 
function draw_line(){ 
	var div = document.createElement("div");     
	div.id = 'f_line'; 
	$('f_infoDiv').insertBefore(div,$('f_infoDiv').childNodes.item(0));             
} 

function head_main(){
	for (var i=0;i<imgUrl.length;i++) { 
		if( (imgUrl[i]!="") && (imgLink[i]!="")&& (imgAlt[i]!="")) { 
			count++; 
		} else { 
			break; 
		} 
	} 

	//表现层 start     
	//图片 
	var a = document.createElement("a");         
	a.id="f_imgLink"; 
	$('f_imgDiv').appendChild(a); 
	var img = document.createElement("img");     
	img.id="f_img"; 
	img.width=imgWidth;
	img.height=imgHeight; 
	img.src=imgUrl[now]; 
	img.alt=imgAlt[now]; 
	a.appendChild(img); 
	//数字按钮 
	for (var i=count-1;i>=0;i--){ 
		var div_bg = document.createElement("div");         
		div_bg.id = 'div_bg'+i; 
		div_bg.className='bg'; 
		$('f_buttonDiv').appendChild(div_bg);     
		var a = document.createElement("a");         
		a.id = 'b'+i; 
		a.className = (i==now+1)?"button_on":"button_off";         
		a.title=imgAlt[i]; 
		a.innerHTML=i+1; 
		a.href='javascript:b_change('+i+')';         
		$('div_bg'+i).appendChild(a);     

		var div= document.createElement("div"); 
		$('f_buttonDiv').appendChild(div);             
	}
	draw_line();	
	//表现层 end 
	$('f_img').onmouseover=function(){window.clearInterval(theTimer);} 
	$('f_img').onmouseout=function(){theTimer = setInterval("change()", _timeOut_);} 
	change();
	theTimer = setInterval("change()", _timeOut_); 
}