var timerlen = 5;
var slideAniLen = 30;
var slideAniWid = 270;
var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

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 slideIzq(objname){
	//alert('slideizq '+objname+' '+moving[objname]);
	     if(moving[objname])
                return;
//alert('slideizq '+objname);
        if(document.getElementById(objname).style.display != "none")
                return; // cannot slide up something that is already hidden
//alert('slideizq '+objname);
        moving[objname] = true;
        dir[objname] = "izquierda";

        expandcollapse_slide(objname);
}
function slideDer(objname){
	//alert('slideDer '+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] = "derecha";

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

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

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

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

        timerID[objname] = setInterval('slidetick2(\'' + objname + '\');',timerlen);
}

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 slidetick2(objname){
        var elapsed = (new Date()).getTime() - startTime[objname];
//alert('ENDSLIDE expand '+objname.style.width+' height '+objname.style.height);
        if (elapsed > slideAniWid )
                endSlideExpand(objname)
        else {
                var d =Math.round(elapsed / slideAniWid * endHeight[objname]);
                if(dir[objname] == "derecha")
                        d = endHeight[objname] - d;

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

        return;
}
function endSlideExpand (objname){
	
        clearInterval(timerID[objname]);

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

        obj[objname].style.width = endHeight[objname] + "px";
		
        delete(moving[objname]);
		//alert(moving[objname]+' ENDSLIDE '+objname);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

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

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

        obj[objname].style.height = endHeight[objname] + "px";
		//alert(moving[objname]+' ENDSLIDE '+objname);
        delete(moving[objname]);
		//alert(moving[objname]+' ENDSLIDE '+objname);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}