var img_urls = [
'js_imageslide/bg_image001.jpg' ,
'js_imageslide/bg_image002.jpg' ,
'js_imageslide/bg_image003.jpg' ,
'js_imageslide/bg_image004.jpg' ,
'js_imageslide/bg_image005.jpg' ,
'js_imageslide/bg_image006.jpg' ,
'js_imageslide/bg_image007.jpg' ,
'js_imageslide/bg_image008.jpg' ,
'js_imageslide/bg_image009.jpg' ,
'js_imageslide/bg_image0010.jpg' ,
'js_imageslide/bg_image0011.jpg' ,
'js_imageslide/bg_image0012.jpg'
];
var idx_array, idx_str, obj;
if (!/__RANDOM_BG_IMAGE_ROTATOR__/.test(self.name))
{
var idx, i, ind1, ind2, temp, arraylength = img_urls.length;
idx_array = new Array(arraylength);
for (i = 0; i < arraylength; ++i) idx_array[i] = i;
for (i = 0; i < arraylength; ++i)
{
ind1 = Math.floor(Math.random() * arraylength);
ind2 = Math.floor(Math.random() * arraylength);
temp = idx_array[ind1];
idx_array[ind1] = idx_array[ind2];
idx_array[ind2] = temp;
}
idx_str = idx_array.join(',');
}
else
{
idx_str = self.name.split('__RANDOM_BG_IMAGE_ROTATOR__')[1];
}
idx_array = idx_str.split(',');
var first_idx = idx_array.splice(0,1);
var TABLE_background = img_urls[first_idx];
idx_array[idx_array.length] = first_idx;
idx_str = idx_array.join(',');
self.name = '__RANDOM_BG_IMAGE_ROTATOR__' + idx_str;
obj = new Image();
obj.src = img_urls[idx_array[0]];

onload = function()
{
document.getElementById('imageslider').style.backgroundImage = 'url(' + TABLE_background + ')';
}