ss="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_@"
s7nx.value=10

function v10toX(n,m)
{
m=String(m).replace(/ /gi,"")
if(m=="")return ""
if(parseInt(m)!=m){M("请输入整数！");return ""}
var t=""
var a=ss.substr(0,n)
while(m!=0)
{
	var b=m%n
	t=a.charAt(b)+t
	m=(m-b)/n
}
return t
}

function vXto10(n,m)
{
m=String(m).replace(/ /gi,"")
if(m=="")return ""
var a=ss.substr(0,n)
if(eval("m.replace(/["+a+"]/gi,'')")!=""){M("请输入"+n+"进制数！");return ""}
var t=0,c=1
for(var x=m.length-1;x>-1;x--)
{
t+=c*(a.indexOf(m.charAt(x)))
c*=n
}
return t
}

function vXtoY(n,m,y)
{
a=vXto10(n*1,m)
if(a=="")return ""
a=v10toX(y,a)
return a
}