t_u = null;
	t_u_old = null;
	maxPic = 3;
	showPic = 0;

	function switchPic(curPic){ 
		if(curPic == maxPic){ 
			showPic = 1;
		}else{ 
			showPic = showPic + 1;
		}
		for(i=1; i <= maxPic; i++){ 
			if(i == showPic){ 
				document.getElementById("picA"+i).className = "currON";
				document.getElementById("picUL"+i).style.display = "";
			}else{ 
				document.getElementById("picA"+i).className = "";
				document.getElementById("picUL"+i).style.display = "none";
			}
		}
	}
	function reSwitchPic() { 
		clearTimeout(t_u);
		switchPic(showPic);
		t_u = setTimeout('reSwitchPic();', 5000);
	}
	function pauseSwitch() { 
		clearTimeout(t_u);
		t_u_old = t_u;
	}
	function selectSwitch(num) { 
		showPic = num;
		for(i=1; i <= maxPic; i++){ 
			if(i == num){ 
				document.getElementById("picA"+i).className = "currON";
				document.getElementById("picUL"+i).style.display = "";
			}else{ 
				document.getElementById("picA"+i).className = "";
				document.getElementById("picUL"+i).style.display = "none";
			}
		}
	}
	function goonSwitch() {
		clearTimeout(t_u);
		t_u = setTimeout('reSwitchPic();', 5000);
	}
function alertCharNums(content) {
	var MaxLength = 2000 ;
	if (content.value.length > MaxLength ){
		content.value = content.value.substring(0,MaxLength);
	}
	document.getElementById('char_nums').innerHTML=content.value.length ;
}
   function Check()
   {  
    if (document.form1.Name.value=='')
    {     
     alert('请输入姓名！');
     document.form1.Name.focus(); 
     return false;   
    }   
    if (document.form1.Content.value=='')
    {    
     alert('请输入评论内容！'); 
     document.form1.Content.focus(); 
     return false;   
    }  
    return true; 
   }