var timerlen = 1;
var slideAniLen = 3000;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var endLength = new Array();
var moving = new Array();
var dir = new Array();

function slidedown(objname){

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

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

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

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

        if(dir[objname] == "down"){
                obj[objname].style.top = "483px";
				obj[objname].style.height = "188px";
				
        }

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

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

		
}

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

        if (elapsed > 500)
                endSlide(objname)
        else {
                var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
                if(dir[objname] == "up")
                        d = endHeight[objname] - d;
						
				if(dir[objname] == "down"
					   
					   )
                        d = endHeight[objname] + d;

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

        return;
		
}

function endSlide(objname){
	
        clearInterval(timerID[objname]);
        if(dir[objname] == "up")
		{
		obj[objname].style.top = "483px";
		obj[objname].style.hieght = "288px";
		}
		
		if(dir[objname] == "down")
		{
		obj[objname].style.top = "583px";
		obj[objname].style.hieght = "188px";
		}
		//alert(test)
        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
		delete(endLength[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
		

}
function toggleSlide(objname){
  if(document.getElementById(objname).style.top == "483px"){
    slidedown(objname);
  }else{
    slideup(objname);
  }
}