function chpic(str,a,b){
	for (i=1;i<=a;i++){
		obj=document.getElementById("tpic"+str+i)
		obj2=document.getElementById("div"+str)
		obj3=document.getElementById("page"+str+i)
		if (b==i){
			obj.src="image/title"+str+i+".gif"
			obj2.innerHTML=obj3.innerHTML
		}
		else
		{
			obj.src="image/title"+str+i+"b.gif"
		}
	
	}
}
function showitem(showid,hideenid,defaultcss,changecss,cssname)
{
	document.getElementById(showid).style.display="block";
	document.getElementById(hideenid).style.display="none";
	document.getElementById(defaultcss).className=cssname;
	document.getElementById(changecss).className="";
}