var uls = document.getElementById("imgp");
var linum=uls.getElementsByTagName("LI");
var lennum=linum.length;
var n=1;
function piclh(){
for(var i=0;i<lennum;i++){
     if(i==n){
	 linum[i].className="on";
	 document.getElementById("iTabCon"+i).style.display="block";
	 }else{
	 linum[i].className="";
	 document.getElementById("iTabCon"+i).style.display="none";
	 }
    }
	n=n+1;
	if(n>=lennum)n=0;
}
var plh=setInterval("piclh()",3000);


function offlh(k){
clearInterval(plh);
n=k;  
piclh();
}
function onlh() {
plh=setInterval("piclh()",3000);
}