var MsgText="Welcome to the Global Environmental Institute！";
//-------------Scroll speed
var interval = 100;
//-------------User define the Scroll length
var user_len = 100;

var modes='inout';

function ScrollStatus(pos,mode)
{
	len=MsgText.length > user_len || mode == "out" ? MsgText.length : user_len;
	if(mode == "in")
		window.status=MsgText.substring(0,pos);
	else
		window.status=MsgText.substring(pos,len);
	pos++;
	if(pos < 0 || pos > len )
	{
		//-------------模式转换
		pos=0;
		window.setTimeout("ScrollStatus(" + pos + ",'" + modes.replace(mode,"") + "')" , interval);
	}
	else
		//-------------继续相同模式
		window.setTimeout("ScrollStatus(" + pos + ",'" + mode + "')" , interval);
}
/* ScrollStatus(0,'in'); */