var timerlen = 2;
var slideAniLen = 500;

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] = slidetick(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){
        window.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;
}
//these global variable are must to use callfunction.
var opendiv=false;
var opendivid="";
var imgid="";
function callfunction(div2slide,imgcontrol,img1,img2){
	//id=document.getElementById(div2slide)
			 if(opendiv==true && opendivid!=div2slide)
			{
				opendiv=false;								
				slideup(opendivid);
				document.getElementById(imgid).src=img2;
			}			
		if(document.getElementById(div2slide).style.display=='none'){
				opendivid=div2slide;
				imgid=imgcontrol;
				opendiv=true;
				slidedown(div2slide);
				document.getElementById(imgcontrol).src=img1;			
		}
}
/*function callfunc_input(ids,div2slide){
	id=document.getElementById(ids);
	val=id.value;
	if(val!=""){
	slidedown(div2slide);
	}
	else if(val==""){
	slideup(div2slide);
	}
}*/