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 show_FullPhoto(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();

      return false;
}

function show_FormError(elem, iError)
{
	var arError = new Array();

	arError[0] = 'Пожалуйста, заполните все обязательные поля';
	arError[1] = 'Пожалуйста, правильно укажите E-mail';
	arError[2] = 'Пожалуйста, правильно укажите URL сайта';
    arError[3] = 'Поле должно содержать только числовое значение';

    elem.focus();
    alert(arError[iError]);

	return false;
}

function do_FormValid(sFormName)
{
    var form = document.forms[sFormName];

	for(var i=0; i<form.elements.length; i++)
	{
		elem = form.elements[i];

	    if(elem.type == 'hidden') continue;

	    if(elem.getAttribute('set') != null)
	    {
	    	if(elem.getAttribute('set').indexOf('*') != -1)
	        {
	        	if(elem.value == '')
	            {
                    return show_FormError(elem, 0);
	            }
	        }

	        if(elem.getAttribute('set').indexOf('mail') != -1 && elem.value != '')
	        {
	        	var reg = /^[A-Za-z0-9_\-\.=+~]+@[A-Za-z0-9_\-\.]+\.[A-Za-z]{2,4}\s*$/;

	            if (elem.value.match(reg) == null)
	            {
                    return show_FormError(elem, 1);
	            }
	        }

	        if(elem.getAttribute('set').indexOf('url') != -1 && (elem.value != ''))
	        {
	        	var reg = /^\s*(http[s]?:\/\/)?[A-Za-z0-9_\-\.]+\.[A-Za-z]{2,4}\s*$/;

	            if (elem.value.match(reg) == null)
	            {
                    return show_FormError(elem, 2);
	            }
	        }

            if(elem.getAttribute('set').indexOf('int') != -1 && (elem.value != ''))
	        {
	        	var reg = /^[0-9]+\s*$/;

	            if (elem.value.match(reg) == null)
	            {
                    return show_FormError(elem, 3);
	            }
	        }
	    }
	}
	return true;
}

function do_HideSubMenu(ElementID)
{
    var obj = getRef(ElementID);

    if(!obj) return false;

    var itemstyle = obj.style;

    if(itemstyle.display == 'none')
    {
    	itemstyle.display = 'block';
    }
    else
    {
    	if(itemstyle.display == 'block')
	    {
	    	itemstyle.display = 'none';
	    }
	}

    return true;
}