function show_image(curDocument, curImage)
{	
	document.main_image.src = curDocument + "/" + curImage + ".jpg";
}

function hide_image()
{	
	document.main_image.src = "images/pic_fill.jpg";
}

function menu_over(curButton)
{
	document[curButton].src = "images/menu_overlay.gif";
}

function menu_off(curButton)
{
	document[curButton].src = "images/spacer.gif";
}

function preLoad_images()
{
	if (document.images) 
	{
	   img1_1 = new Image();
	   img1_2 = new Image();
	   img1_3 = new Image();
	   img2_1 = new Image();
	   img2_2 = new Image();
	   img2_3 = new Image();
	   img3_1 = new Image();
	   img3_2 = new Image();
	   img3_3 = new Image();
	   img4_1 = new Image();
	   img4_2 = new Image();
	   img4_3 = new Image();
	   img5_1 = new Image();
	   img5_2 = new Image();
	   img5_3 = new Image();
	   img6_1 = new Image();
	   img6_2 = new Image();
	   img6_3 = new Image();
	   img7_1 = new Image();
	   img7_2 = new Image();
	   img7_3 = new Image();
	   img8_1 = new Image();
	   img8_2 = new Image();
	   img8_3 = new Image();
	
	   img1_1.src = "p1/pic1.jpg";
	   img1_2.src = "p1/pic2.jpg";
	   img1_3.src = "p1/pic3.jpg";
	   img2_1.src = "p2/pic1.jpg";
	   img2_2.src = "p2/pic2.jpg";
	   img2_3.src = "p2/pic3.jpg";
	   img3_1.src = "p3/pic1.jpg";
	   img3_2.src = "p3/pic2.jpg";
	   img3_3.src = "p3/pic3.jpg";
	   img4_1.src = "p4/pic1.jpg";
	   img4_2.src = "p4/pic2.jpg";
	   img4_3.src = "p4/pic3.jpg";
	   img5_1.src = "p5/pic1.jpg";
	   img5_2.src = "p5/pic2.jpg";
	   img5_3.src = "p5/pic3.jpg";
	   img6_1.src = "p6/pic1.jpg";
	   img6_2.src = "p6/pic2.jpg";
	   img6_3.src = "p6/pic3.jpg";
	   img7_1.src = "p7/pic1.jpg";
	   img7_2.src = "p7/pic2.jpg";
	   img7_3.src = "p7/pic3.jpg";
	   img8_1.src = "p8/pic1.jpg";
	   img8_2.src = "p8/pic2.jpg";
	   img8_3.src = "p8/pic3.jpg";
	}
}