var isDOM = (document.getElementById ? true : false);
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);

function getRef(ElementID)
{
   if (isDOM) return document.getElementById(ElementID);
   if (isIE4) return document.all[ElementID];
   if (isNS4) return document.layers[ElementID];
}


function preloadImages()
{
   ;
}


function ValidEmail()
{
   var reg = /^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]+\.[A-Za-z]{2,4}$/;

   f_Email = document.SubscribeOn.f_Email.value;

   if (f_Email.match(reg) == null)
   {
       alert('Укажите, пожалуйста, верный E-mail');
       return false;
   }

   return true;
}


function ImgShw(ID, width, height, alt)
{
      var scroll = "no";
      var top=0, left=0;
      if(width > screen.width-10 || height > screen.height-28) scroll = "yes";
      if(height < screen.height-28) top = Math.floor((screen.height - height)/2-14);
      if(width < screen.width-10) left = Math.floor((screen.width - width)/2-5);
      width = Math.min(width, screen.width-10);
      height = Math.min(height, screen.height-28);
      var wnd = window.open("","","scrollbars="+scroll+",resizable=yes,width="+width+",height="+height+",left="+left+",top="+top);
      wnd.document.write("<html><head>\n");
      wnd.document.write("<"+"script language='JavaScript'>\n");
      wnd.document.write("<!--\n");
      wnd.document.write("function KeyPress()\n");
      wnd.document.write("{\n");
      wnd.document.write("        if(window.event.keyCode == 27)\n");
      wnd.document.write("                window.close();\n");
      wnd.document.write("}\n");
      wnd.document.write("//-->\n");
      wnd.document.write("</"+"script>\n");
      wnd.document.write("<title>\""+alt+"\"</title></head>\n");
      wnd.document.write("<body topmargin=\"0\" leftmargin=\"0\" marginwidth=\"0\" marginheight=\"0\" onKeyPress=\"KeyPress()\">\n");
      wnd.document.write("<a href=# title=Закрыть onclick='window.close()'><img src=\""+ID+"\" border=\"0\" alt=\""+alt+"\"></a>");
      wnd.document.write("</body>");
      wnd.document.write("</html>");
      wnd.document.close();
}

//-->
