function padapter(obj,width,height)
{
var max_height = height;
var max_width = width;
var real_height = obj.height;
var real_width = obj.width;
if(obj.height>max_height)
{
obj.height = max_height;
obj.width = Math.round(obj.height*real_width/real_height);
}
if(obj.width>max_width)
{
obj.width = max_width;
obj.height = Math.round(obj.width*real_height/real_width);
}
}
function fun1(){
	if (document.regform.email.value==""){
		alert("Please input Email.");
		document.regform.email.focus();
		return false;
	}	
	if (document.regform.sn.value==""){
		alert("Please input Series Number.");
		document.regform.sn.focus();
		return false;
	}
    if (ValidEmail(document.regform.email.value)){
		alert("E-Mail error.");
		document.regform.email.focus();
		return false;
	}
}
function fun2(){
	if (document.loginform.user.value==""){
		alert("Please input User ID.");
		document.loginform.user.focus();
		return false;
	}	
	if (document.loginform.password.value==""){
		alert("Please input Password.");
		document.loginform.password.focus();
		return false;
	}
}
function ValidEmail(item){
var etext
var elen
var i
var aa
etext=item
elen=etext.length
if (elen<5)
 return true;
 i= etext.indexOf("@",0)
if (i==0 || i==-1 || i==elen-1)
 return true;
else
 {if (etext.indexOf("@",i+1)!=-1)
  return true;}
if (etext.indexOf("..",i+1)!=-1)
 return true;
i=etext.indexOf(".",0)
if (i==0 || i==-1 || etext.charAt(elen-1)=='.')
 return true;
if ( etext.charAt(0)=='-' ||  etext.charAt(elen-1)=='-')
 return true;
if ( etext.charAt(0)=='_' ||  etext.charAt(elen-1)=='_')
 return true;
for (i=0;i<=elen-1;i++)
{ aa=etext.charAt(i)
  if (!((aa=='.') || (aa=='@') || (aa=='-') ||(aa=='_') || (aa>='0' && aa<='9') || (aa>='a' && aa<='z') || (aa>='A' && aa<='Z')))
   return true;
}
return false;
}