function cerrarPopup(opacity_){
    document.getElementById('popup_trans_gif').style.visibility='hidden';
    document.getElementById('popup_trans_win').style.visibility='hidden';
    var win_iframe = document.getElementById('popup_trans_win_iframe');
    win_iframe.innerHTML='';
//filter:alpha(opacity=40);-moz-opacity: 0.4;opacity: 0.4;
        setTimeout('fondoGradual2()',1);


}
function crearPopup(src_,opacity_,top_,width_,height_,scroll_){
var x,y;
         if (self.pageYOffset) // all except Explorer
{
        x = self.pageXOffset;
        y = self.pageYOffset;
}
else if (document.documentElement && document.documentElement.scrollTop)
{
        x = document.documentElement.scrollLeft;
        y = document.documentElement.scrollTop;
}
else if (document.body) // all other Explorers
{
        x = document.body.scrollLeft;
        y = document.body.scrollTop;
}
    var visible_win = document.getElementById('popup_trans');
    var win = document.getElementById('popup_trans_win');
    var win_btn = document.getElementById('popup_trans_win_btn');
    var win_iframe = document.getElementById('popup_trans_win_iframe');
    win_iframe.innerHTML='<iframe src="' + src_ + '" width="100%" height="100%" id="frame_w_open" name="frame_w_open" frameborder="0" scrolling="' + scroll_ + '"  bgcolor="#FFFFFF" marginwidth="0" marginheight="0"></iframe>';
    win_btn.style.left = width_ + 87;
    win_btn.style.top = 5;
    var str_w = '' + visible_win.style.width;
    var w_ = visible_win.offsetWidth;
    win.style.left=x + (w_/2) - ((width_+110)/2);
    win.style.top = y + top_;
    win.style.width = width_+110;
    win.style.height = height_+4;
    win_iframe.style.width = width_;
    win_iframe.style.height = height_;
    document.getElementById('popup_trans_gif').style.visibility='visible';
    var docwidth = visible_win.offsetWidth;
    var docheight = visible_win.offsetHeight;
    document.getElementById('popup_trans_gif_img').style.width=docwidth;
    document.getElementById('popup_trans_gif_img').style.height=docheight;
    document.getElementById('popup_trans_gif').style.width=docwidth;
    document.getElementById('popup_trans_gif').style.height=docheight;

    document.getElementById('popup_trans_win').style.visibility='visible';
//filter:alpha(opacity=40);-moz-opacity: 0.4;opacity: 0.4;

    opacity_tmp = opacity_;
    grad_temp = 100;
    setTimeout('fondoGradual()',1);

}
var opacity_tmp = 100;
var grad_temp = 100;
function fondoGradual()
{

    if(grad_temp>opacity_tmp)
    {
        grad_temp-=20;
                              var imageobject = document.getElementById('popup_trans');
        imageobject.style.opacity = (grad_temp / 100);
        imageobject.style.MozOpacity = (grad_temp / 100);
        imageobject.style.KhtmlOpacity = (grad_temp / 100);
        imageobject.style.filter = "alpha(opacity=" + grad_temp + ")";
        setTimeout('fondoGradual()',1);

    }
}
function fondoGradual2()
{

    if(opacity_tmp<100)
    {
        opacity_tmp+=20;
        var imageobject = document.getElementById('popup_trans');
        imageobject.style.opacity = (opacity_tmp / 100);
        imageobject.style.MozOpacity = (opacity_tmp / 100);
        imageobject.style.KhtmlOpacity = (opacity_tmp / 100);
        imageobject.style.filter = "alpha(opacity=" + opacity_tmp + ")";
        setTimeout('fondoGradual2()',1);

    }
}