function setMainItem(ss,suf_Id,style1,style2){
	    var s=ss.split(",");
		for(var i=0;i<s.length;i++){
	     	var num=s[i];
	        var tempMenuId = "index_page"+num;
			var tempMainId ="focusPic"+num;
			document.getElementById(tempMenuId).className = num==suf_Id?style1:style2;
			document.getElementById(tempMainId).style.display = num==suf_Id?"block":"none";
	     }	
	 }