if(document.images){
var ldimg;
var arimgs = new Array(
'../imgs/bak1.gif',
'../imgs/bak2.gif',
'../imgs/lft_bak1.gif',
'../imgs/lft_bak2.gif',
'../imgs/footer.gif'
);
for (var i=0; i<arimgs.length; i++) {
ldimg = new Image();
ldimg.src = arimgs[i];
}
}