// JavaScript Document

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
	document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
	d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
	if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
	obj.visibility=v; }
}

function f_clear()
{
	form1.content.value = "";
	if (FCKeditorAPI != null)
	{
		var oEditor = FCKeditorAPI.GetInstance('content');
		oEditor.SetHTML('');
	}
}
function f_rep()
{
	document.form1.submit();
}

function validata_form()
{
	validity=true;
	var contentlen ;
	if (FCKeditorAPI != null)
	{
		var oEditor = FCKeditorAPI.GetInstance('content');
		contentlen = oEditor.GetXHTML();
	}
	if (document.form1.username.value == "")
	{
		validity=false;
		alert('请填写你的大名!');
		document.form1.username.focus();
		return validity;
	}

	if (contentlen == "")
	{
		validity=false;
		alert('请填写回复内容!');
		if (document.form1.content.visible == true)
		{
			document.form1.content.focus();
		}
		return validity;
	}

	if (contentlen.length > 200000)
	{
		validity=false;
		alert('您填写的内容超过系统限定的文件大小');
		if (document.form1.content.visible == true)
		{
			document.form1.content.focus();
		}
		return validity;
	}
	return validity;
}
function check_email(address)
{
	if ((address == "")
		|| (address.indexOf ('@') == -1)
		|| (address.indexOf ('.') == -1))
		return false;
	return true;
}

function c_form()
{
	validity=true;

	if (!check_empty(document.form2.username.value))
	{
		validity=false;
		alert('请输入用户名!');
		document.form2.username.focus();
		return validity;
	}

	if (!check_empty(document.form2.password.value))
	{
		validity=false;
		alert('请输入密码!');
		document.form2.password.focus();
		return validity;
	}
}

function cform()
{
	if(!confirm("您确认删除吗? 请注意删除后无法恢复!"))
		return false;
}

//把指定的图片，按比例缩小到w * h 的范围内
function f_resizeimg(img,w,h)
{
	if(img.width>w || img.height>h)
	{
		var zoomX = 1;
		var zoomY = 1;
		var zoom = 1;
		zoomX = w/img.width;
		zoomY = h/img.height;
		zoom = zoomX < zoomY ? zoomX : zoomY;
		img.width = img.width * zoom;
		img.height = img.height * zoom;
	}
}