function edit_div(div_name) {	
	  document.getElementById(div_name+"_form").style.display = "block";
	  document.getElementById(div_name+"_txt").style.display = "none";
}

function toggle_btn(btn_name, src_name, state) {
	if(state == "show") {
		document.getElementById(btn_name).src = "images/icons/"+src_name+".gif";
	} else {
		document.getElementById(btn_name).src = "images/icons/"+src_name+"_alpha.gif";
	}
}

function timedMsg() {
	var t=setTimeout("slideup('div_message')",4000);
}

function add_art_add() {
	if(document.getElementById('div_art_add').style.display == "none") {
		document.getElementById('img_art_add').src = "images/icons/subtract.gif";
		slidedown('div_art_add');		
	} else {
		document.getElementById('img_art_add').src = "images/icons/add.gif";
		slideup('div_art_add');
		
	}
}

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();

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;
}

function toggleSlide(objname){
  if(document.getElementById(objname).style.display == "none"){
	  
    slidedown(objname);
  }else{
	  
    slideup(objname);
  }
}