function bigimage(imgname, dx, dy, coment) {
myWin= open("", "new_window","width="+dx+",height="+dy+",status=no,toolbar=no,menubar=no");
myWin.document.open();
myWin.document.write("picture");
myWin.document.write("");
if(coment.lenght>0)myWin.document.write(""+coment+"
");
myWin.document.write("");
myWin.document.close();
}