var timerlen = 5;
var slideAniLen = 750;
var flecha_abajo="imagenes/producto/flecha_abajo.gif";
var flecha_arriba="imagenes/producto/flecha_arriba.gif";

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

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);
}

/********************************************/

/* slidedown with location.href */
function slidedownLHR(objname, lhref){
if(moving[objname])
return;

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

moving[objname] = true;
dir[objname] = "down";
startslideLHR(objname, lhref);
endHeight[objname] = getDynamicHeight(objname);

}


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

if (elapsed > slideAniLen){
endSlide(objname);
location.href=lhref;
} else {
var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
if(dir[objname] == "up")
d = endHeight[objname] - d;
if (d < 0) {
d = 0;
}

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

return;

}

function startslideLHR(objname, lhref){
obj[objname] = document.getElementById(objname);

//endHeight[objname] = getDynamicHeight();
startTime[objname] = (new Date()).getTime();

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

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

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

//location.href=lhref;

}

/********************************************/

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);
}

var endHeightDynamic;

function getDynamicHeight(objname)
{
//if(!endHeightDynamic)
endHeightDynamic = document.getElementById(objname).scrollHeight;

endHeightDynamic = document.getElementById(objname).scrollHeight;

return endHeightDynamic;
}

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

//endHeight[objname] = getDynamicHeight();
startTime[objname] = (new Date()).getTime();

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

obj[objname].style.display  = "block";
//la linea de la posicion relativa se agregó para que no ocurriera un bug que existe en IE6
obj[objname].style.position = "relative";

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

}


//second StartSlide
/*function startslide(objname){
obj[objname] = document.getElementById(objname);

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

obj[objname].style.display = "block";
startTime[objname] = (new Date()).getTime();
endHeight[objname] = obj[objname].scrollHeight;

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;
if (d < 0) {
d = 0;
}

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

return;

}

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

if(dir[objname] == "up") {
    obj[objname].style.display = "none";
    if (imagen_a_bajar != undefined) 
    {
        imagen_a_bajar.src=flecha_abajo;
    }    
}
if (dir[objname] == "down") {
    if(imagen_a_bajar!=undefined)
    {
        imagen_a_bajar.src=flecha_arriba;
    }    
}

//obj[objname].style.height = endHeight[objname] + "px";
//esta linea fue modificada para que al terminar el evento de slide deje 
//al objeto con height auto y no con height fijo
//ademas se modifica el div para que no tenga un bug mostrado en IE6
obj[objname].style.height   = "auto";
obj[objname].style.position = "static";
delete(moving[objname]);
delete(timerID[objname]);
delete(startTime[objname]);
delete(endHeight[objname]);
delete(obj[objname]);
delete(dir[objname]);

return;
}

function toggleSlide(objname,imagen){
imagen_a_bajar=document.getElementById(imagen);
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);
}
endHeight[objname] = getDynamicHeight(objname);
}