var wnd;
function opendocs(url, height, width)
{
    //width=500;
    //height=290;
    l = 40;
    t = 150;

    if (wnd && wnd.closed == false){
        wnd.close();
        wnd = false;
    }
    if (!height){
        wnd = window.open(url, "_blank", "top="+t+",left="+l+",toolbar=0,status=0,location=0,menubar=0,directories=0,resizable=1,scrollbars=1,width="+width);
    }else{
        wnd = window.open(url, "_blank", "top="+t+",left="+l+",toolbar=0,status=0,location=0,menubar=0,directories=0,resizable=1,scrollbars=1,width="+width+",height="+height);
    }
}