var isDOM=document.getElementById //isDOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
var isOpera=isOpera5=window.opera && isDOM //Opera 5+
var isOpera6=isOpera && window.print //Opera 6+
var isOpera7=isOpera && document.readyState //Opera 7+
var isMSIE=document.all && document.all.item && !isOpera //Microsoft Internet Explorer 4+
var isMSIE5=isDOM && isMSIE //MSIE 5+
var isNetscape4=document.layers //Netscape 4.*
var isMozilla=isDOM && navigator.appName=="Netscape" //Mozilla или Netscape 6.*

  
function showPop2()
{       
    opacity('popup2',0,100,300); 
}


function opacity(id, opacStart, opacEnd, millisec) 
{              
    var speed = Math.round(millisec / 100);   
    var timer = 0;    

    if(opacStart > opacEnd) 
    {                  
        var object = document.getElementById(id).style;
        object.opacity = (opacStart / 100);
        object.MozOpacity = (opacStart / 100);
        object.KhtmlOpacity = (opacStart / 100);
        object.filter = "alpha(opacity=" + opacStart + ")";
        for(i = opacStart; i >= opacEnd; i--) 
        {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;   
        }

    } 
    else if(opacStart < opacEnd) 
    {                       
        var object = document.getElementById(id).style;
        object.opacity = (opacStart / 100); 
        object.MozOpacity =(opacStart / 100); 
        object.KhtmlOpacity = (opacStart / 100); 
        object.filter = "alpha(opacity=" + opacStart + ")"; 
        object.visibility=(isDOM||document.all||isMozilla)? "visible" : "show";  
        for(i = opacStart; i <= opacEnd; i++)
        {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }  
    }                                                                                       
}

function changeOpac(opacity, id) 
{
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);                 
    object.filter = "alpha(opacity=" + opacity + ")";       
} 

function show(id){ document.getElementById(id).style.visibility=(isDOM||document.all||isMozilla)? "visible" : "show"; }

function hidden(id){  document.getElementById(id).style.visibility="hidden";  }

function hiddPop2()
{       
    setTimeout("opacity('popup2'," + 100+","+0+","+300 + ")",1500);  
}