var pic_up   = new Array(5);
var pic_down = new Array(5);
var i;

for(i=0 ; i<5 ; i++)
{
  pic_up[i]   = new Image();
  pic_down[i] = new Image();
}

pic_up[0].src   = 'http://www.wandkarte24.at/images/header/groesse_on.gif';
pic_down[0].src = 'http://www.wandkarte24.at/images/header/groesse_off.gif';
pic_up[1].src   = 'http://www.wandkarte24.at/images/header/rahmenoptik_on.gif';
pic_down[1].src = 'http://www.wandkarte24.at/images/header/rahmenoptik_off.gif';
pic_up[2].src   = 'http://www.wandkarte24.at/images/header/zeichenerklaerung_on.gif';
pic_down[2].src = 'http://www.wandkarte24.at/images/header/zeichenerklaerung_off.gif';
pic_up[3].src   = 'http://www.wandkarte24.at/images/header/zubehoer_on.gif';
pic_down[3].src = 'http://www.wandkarte24.at/images/header/zubehoer_off.gif';
pic_up[4].src   = 'http://www.wandkarte24.at/images/header/material_on.gif';
pic_down[4].src = 'http://www.wandkarte24.at/images/header/material_off.gif';

function up(fPosIdx,fImgIdx)
{
  document[fPosIdx].src = pic_up[fImgIdx].src;
}

function down(fPosIdx,fImgIdx)
{
  document[fPosIdx].src = pic_down[fImgIdx].src;
}