if (document.images)
{
preload_image_object = new Image();

// set image url
image_url = new Array();
image_url[0] = "images/t_link_1_hover.jpg";
image_url[1] = "images/t_link_2_hover.jpg";
image_url[2] = "images/t_link_3_hover.jpg";
image_url[3] = "images/t_link_4_hover.jpg";
image_url[4] = "images/link_1_hover.jpg";
image_url[5] = "images/link_2_hover.jpg";
image_url[6] = "images/link_3_hover.jpg";
image_url[7] = "images/link_4_hover.jpg";
image_url[8] = "images/link_5_hover.jpg";

var i = 0;
for(i=0; i<=8; i++) 
preload_image_object.src = image_url[i];
}