function arrow(obj,id)
{img=document.getElementById('img'+id);div=document.getElementById('i-'+id);
if (div.className=='ishow'){arrow_hide(div,img);}else{arrow_show(div,img);}}

function arrow_show(obj,img)
{obj.className='ishow';img.src='/images/arrow-up.gif';}

function arrow_hide(obj,img)
{obj.className='ihide';img.src='/images/arrow-down.gif';}

function max()
{divs=document.getElementsByTagName('div');
for(x=0;x<divs.length;x++){element=divs[x].id;
if(element.indexOf('i-')==0){img=document.getElementById('img'+element.substr(2));
arrow_show(document.getElementById(divs[x].id),img);}}}

function min()
{divs=document.getElementsByTagName('div');
for(x=0;x<divs.length;x++){element=divs[x].id;
if(element.indexOf('i-')==0){img=document.getElementById('img'+element.substr(2));
arrow_hide(document.getElementById(divs[x].id),img);}}}