var timerlen = 5;
var slideAniLen = 250;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();
Nom = navigator.appName;

ns = (Nom == 'Netscape') ? 1:0
ie = (Nom == 'Microsoft Internet Explorer') ? 1:0


function AllUp(){
	slideup('div1b');
	slideup('div2b');
	slideup('div3b');
	slideup('div4b');
}
function Up(objname){
	//slideup(objname);
	AllUp();
}


function switchSlide(objname){
	var div0=document.getElementById('maindiv0');
	var div1=document.getElementById('maindiv1');
	var div2=document.getElementById('maindiv2');
	var div3=document.getElementById('maindiv3');
	var div4=document.getElementById('maindiv4');

	if (ie) { 
		switch(objname){
			case 'div4':
				div1.style.zIndex=5;
				div2.style.zIndex=5;
				div3.style.zIndex=5;
				div4.style.zIndex=1;
				break;
			case 'div3':
				div1.style.zIndex=5;
				div2.style.zIndex=5;
				div3.style.zIndex=1;
				div4.style.zIndex=5;
				break;
			case 'div2':
				div1.style.zIndex=5;
				div2.style.zIndex=1;
				div3.style.zIndex=5;
				div4.style.zIndex=5;
				break;
			case 'div1':
				div1.style.zIndex=1;
				div2.style.zIndex=5;
				div3.style.zIndex=5;
				div4.style.zIndex=5;
				break;
		}
	}
	if (div0) slideup('div0');
	slideup('div1');
	slideup('div2');
	slideup('div3');
	slideup('div4');
	slideup('div1b');
	slideup('div2b');
	slideup('div3b');
	slideup('div4b');

	if(document.getElementById(objname).style.display == "none"){
	    // div is hidden, so let's slide down
	    slidedown(objname);
	}else{
	    // div is not hidden, so slide up
	    slideup(objname);
		if(div0 && (document.getElementById('maindiv1').style.display == "") && 
			(document.getElementById('maindiv2').style.display == "") && 
			(document.getElementById('maindiv3').style.display == "") && 
			(document.getElementById('maindiv4').style.display == "")){

			if (document.getElementById('maindiv0').style.display == "") {
				slidedown('div0');
			
			}
		} 
	}


}

function switchSlide2(objname){
	var div1=document.getElementById('maindiv1');
	var div2=document.getElementById('maindiv2');
	var div3=document.getElementById('maindiv3');
	var div4=document.getElementById('maindiv4');
	if (ie) { 
		switch(objname){
			case 'div4b':
				div1.style.zIndex=5;
				div2.style.zIndex=5;
				div3.style.zIndex=5;
				div4.style.zIndex=1;
				break;
			case 'div3b':
				div1.style.zIndex=5;
				div2.style.zIndex=5;
				div3.style.zIndex=1;
				div4.style.zIndex=5;
				break;
			case 'div2b':
				div1.style.zIndex=5;
				div2.style.zIndex=1;
				div3.style.zIndex=5;
				div4.style.zIndex=5;
				break;
			case 'div1b':
				div1.style.zIndex=1;
				div2.style.zIndex=5;
				div3.style.zIndex=5;
				div4.style.zIndex=5;
				break;
		}
	}
	slideup('div1');
	slideup('div2');
	slideup('div3');
	slideup('div4');
	slideup('div1b');
	slideup('div2b');
	slideup('div3b');
	slideup('div4b');
	if(document.getElementById(objname).style.display == "none"){
    	// div is hidden, so let's slide down
	    slidedown(objname);		

	}else{
    	// div is not hidden, so slide up
    	slideup(objname);
  	}

}



function slidedown(objname){

        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display != "none")
                return; // cannot slide down something that is already visible

        moving[objname] = true;
        dir[objname] = "down";
        startslide(objname);

}

function slideup(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display == "none")
                return; // cannot slide up something that is already hidden

        moving[objname] = true;
        dir[objname] = "up";
        startslide(objname);
}

function startslide(objname){
        obj[objname] = document.getElementById(objname);

        endHeight[objname] = parseInt(obj[objname].style.height);
        startTime[objname] = (new Date()).getTime();

        if(dir[objname] == "down"){
                obj[objname].style.height = "1px";
        }

        obj[objname].style.display = "block";

        timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname){
        var elapsed = (new Date()).getTime() - startTime[objname];

        if (elapsed > slideAniLen)
                endSlide(objname)
        else {
                var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
                if(dir[objname] == "up")
                        d = endHeight[objname] - d;

                obj[objname].style.height = d + "px";
        }

        return;
}

function endSlide(objname){
        clearInterval(timerID[objname]);

        if(dir[objname] == "up")
                obj[objname].style.display = "none";

        obj[objname].style.height = endHeight[objname] + "px";

        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}