var opac_t;
var basla_op=0;
var bit_op=100;
var art_op=20;
var art_op2=10;
var cur_op=0;
var time_op=50;
var yon=1;
var basladi=false;
var bitti=false;



function baslat() {
   if (!basladi) {


    PencereyiOrtala('vformu');
	basladi=true;
	var opac_t=setTimeout("yenileopacity()",time_op);
   }

   
   return true;
}

function yenileopacity() {
   if (cur_op>bit_op)
   {
     yon=yon*(-1);
	 cur_op=bit_op;
     if (document.all) {
     document.getElementById('zformu').filters.alpha.opacity=100; 
	 } else {
	 document.getElementById('zformu').style.opacity=1;
	 }
	 clearTimeout(opac_t) ;
	 var opac_t=setTimeout("yenileopacity()",15000);
	 return true;

   }
   if (yon>0) {cur_op=cur_op+yon*art_op;} else {cur_op=cur_op+yon*art_op2;}
    if (cur_op<0)
	{
	bitir(opac_t);
	return true;
	}

     if (document.all)
     {
	 document.getElementById('zformu').filters.alpha.opacity=cur_op;
     } else {
	 document.getElementById('zformu').style.opacity=cur_op/100;
	 }
	 clearTimeout(opac_t) ;
	 var opac_t=setTimeout("yenileopacity()",time_op);
	 
   
   
   return true;
}

function bitir(gelen_t) {
	bitti=true;
	clearTimeout(gelen_t) ;
	document.getElementById('vformu').height="0px";
	document.getElementById('vformu').width="0px";
	document.getElementById('vformu').style.visibility='hidden';
	document.getElementById('vformu').style.display='none';
	return true;
}

function PencereyiOrtala(gelenid) {
    var gelenlb=gelenid;
    if (document.getElementById && !document.all) {
        document.getElementById(gelenlb).style.height = window.innerHeight+"px"; 
        document.getElementById(gelenlb).style.width = window.innerWidth+"px"; 
        var hx1=window.innerHeight-25;
        document.getElementById('zformu').style.height = hx1+"px"; 
        document.getElementById('zformu').style.width = window.innerWidth+"px"; 
      } else { 
        document.getElementById(gelenlb).style.height = f_clientHeight(); 
        document.getElementById(gelenlb).style.width = f_clientWidth(); 
        document.getElementById('zformu').style.height = f_clientHeight()-25; 
        document.getElementById('zformu').style.width = window.f_clientWidth();  
    }
	document.getElementById(gelenid).style.visibility='visible';
	return true;
}

function pencere(penW,penH) {
    var gelenid="vformu";
    var gelenlb=gelenid+"lb";
    var gelenif=gelenid+"if";
    var i=penH+68;
    var j=penW+40;
    var penHx=""+i+"px"; 
    var penWx=""+j+"px"; 
//    document.getElementById("videof").src="/istanbul-24-saat/index.html";
    document.getElementById(gelenid).style.width=penWx;
    document.getElementById(gelenid).style.height=penHx;
    document.getElementById(gelenif).style.width=penWx;
    document.getElementById(gelenif).style.height=penHx;
    if (document.getElementById && !document.all) {
        var h1 = window.innerHeight+window.pageYOffset;  
        document.getElementById(gelenlb).style.height = h1+"px"; 
        document.getElementById(gelenlb).style.width = window.innerWidth; 
        var IpopTop = Math.ceil((window.innerHeight - document.getElementById(gelenid).offsetHeight)/2);
        var IpopLeft = Math.ceil((window.innerWidth - document.getElementById(gelenid).offsetWidth)/2);
        IpopTop = Math.ceil(IpopTop+window.pageYOffset);
        IpopLeft = Math.ceil(IpopLeft+window.pageXOffset);
        document.getElementById(gelenid).style.left = IpopLeft+"px";
        document.getElementById(gelenid).style.top = IpopTop+"px";
      } else { 
        var h1 = f_clientHeight()+f_scrollTop();  
        document.getElementById(gelenlb).style.height = h1+"px"; 
        document.getElementById(gelenlb).style.width = f_clientWidth(); 
        var IpopTop = Math.ceil((f_clientHeight() - document.getElementById(gelenid).offsetHeight)/2);
        var IpopLeft = Math.ceil((f_clientWidth() - document.getElementById(gelenid).offsetWidth)/2);
        IpopTop = Math.ceil(IpopTop+f_scrollTop());
        IpopLeft = Math.ceil(IpopLeft+f_scrollLeft());
        document.getElementById(gelenid).style.left = IpopLeft+"px";
        document.getElementById(gelenid).style.top = IpopTop+"px";
    }
    document.getElementById(gelenlb).style.visibility='visible';
    document.getElementById(gelenid).style.visibility='visible';
}
function pencereKapat() {
    var gelenid="vformu";
    var gelenlb=gelenid+"lb";
    document.getElementById(gelenid).style.visibility='hidden';
    document.getElementById(gelenlb).style.visibility='hidden';
    document.getElementById(gelenid).style.width="1px";
    document.getElementById(gelenid).style.height="1px";
    document.getElementById(gelenlb).style.width="1px";
    document.getElementById(gelenlb).style.height="1px";
}


function f_clientWidth() {
    return f_filterResults (
        window.innerWidth ? window.innerWidth : 0,
        document.documentElement ? document.documentElement.clientWidth : 0,
        document.body ? document.body.clientWidth : 0
    );
}

function f_clientHeight() {
    return f_filterResults (
        window.innerHeight ? window.innerHeight : 0,
        document.documentElement ? document.documentElement.clientHeight : 0,
        document.body ? document.body.clientHeight : 0
    );
}

function f_scrollLeft() {
    return f_filterResults (
        window.pageXOffset ? window.pageXOffset : 0,
        document.documentElement ? document.documentElement.scrollLeft : 0,
        document.body ? document.body.scrollLeft : 0
    );
}

function f_scrollTop() {
    return f_filterResults (
        window.pageYOffset ? window.pageYOffset : 0,
        document.documentElement ? document.documentElement.scrollTop : 0,
        document.body ? document.body.scrollTop : 0
    );
}

function f_filterResults(n_win, n_docel, n_body) {
    var n_result = n_win ? n_win : 0;
    if (n_docel && (!n_result || (n_result > n_docel)))
        n_result = n_docel;
    return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}