function fontzoom(size)
{
	document.getelementbyid('content').style.fontsize=size+'px'
}

var icheck = 0 ;
function selectall(theform,edition)
{
	var edition=edition;
	var cancel;
	var selectall;
	if (edition==0)
		{
			cancel="取 消";
			selectall="全 选"
		}
	else
		{
			cancel="cancel";
			selectall="select all"
		}
	if (icheck==0)
	{
		for (var i=0;i<theform.elements.length;i++)
		{
			theform.elements[i].checked = true ;
			icheck = 1 ;
			theform.selectall.value = cancel ;
		}
	}
	else
	{
		for (var i=0;i<theform.elements.length;i++)
		{
			theform.elements[i].checked = false ;
			icheck = 0 ;
			theform.selectall.value = selectall ;
		}
	}
}

function switchmenu(sortcount,allcount)
{
var ss;
for (i=1;i<=allcount;i++)
{
	ss=eval("sort1_"+i);
	if (sortcount==i)
	{
		ss.style.display ="";
	}
	else
		ss.style.display ="none";
}
}

function switchmenu1(sortcount,sortcount1,allcount1)
{
var ss,bts;
ss=eval("sort1_"+sortcount);
ss.style.display ="";
for (i=1;i<=allcount1;i++)
{
	ss1=eval("sort_"+sortcount+"_"+i);
	if (sortcount1==i)
	{
		ss1.style.display ="";
	}
	else
		ss1.style.display ="none";
}
}

function switchmenubbs(sortcount,allcount){
var ss;
for (i=1;i<=allcount;i++)
{
	ss=eval("aa"+i);
	if (sortcount==i)
	{
		if (ss.style.display =="")
			ss.style.display ="none";
		else 
			ss.style.display ="";
	}
	else
		ss.style.display ="none";
}
}

function single_width(num)
{
 	var width_str;	
	width_str=(document.getelementbyid("pro_classbody").offsetwidth)/num
	document.getelementbyid("class_div").style.width=width_str;
}