function open_win(link,_width,_height)
{
y = (screen.availHeight - _height)/2;
    x = (screen.availWidth - _width)/2;

var optiuni='width='+_width+',height='+_height+',screenX='+x+',screenY='+y+',top='+y+',left='+x+',scrollbars=no,resizable=no,location=no,toolbar=no,status=no,menubar=no';

window.open(link,'mywindow',optiuni);
}

function open_win2(link,_width,_height)
{
y = (screen.availHeight - _height)/2;
    x = (screen.availWidth - _width)/2;

var optiuni='width='+_width+',height='+_height+',screenX='+x+',screenY='+y+',top='+y+',left='+x+',scrollbars=no,resizable=no,location=no,toolbar=no,status=no,menubar=no';

window.open(link,'mywindow2',optiuni);
}

function open_video_win( link )      //402,347
{
y = (screen.availHeight - 347)/2;
    x = (screen.availWidth - 402)/2;

var optiuni='width=402,height=347,screenX='+x+',screenY='+y+',top='+y+',left='+x+',scrollbars=no,resizable=no,location=no,toolbar=no,status=no,menubar=no';

window.open(link,'mywindow2',optiuni);
}

function open_audio_win( link )      //269,135
{
y = (screen.availHeight - 135)/2;
    x = (screen.availWidth - 269)/2;

var optiuni='width=269,height=135,screenX='+x+',screenY='+y+',top='+y+',left='+x+',scrollbars=no,resizable=no,location=no,toolbar=no,status=no,menubar=no';

window.open(link,'mywindow',optiuni);
}