function overPic( pnum ) {

	// Get the main picture holding element
	getImg = document.getElementById( "photoImg" );

	// Change image to desired
	getImg.src = "pic_" + pnum +".jpg";

	// Get the hyperlink to the main picture holding element
	getLink = document.getElementsByName( "IGalMainImgLink" );

	// Change link to desired
	getLink[0].href = "pic_" + pnum +".jpg";

	// Change link ID to desired for LightBox script
	getLink[0].id = "P" + pnum;

}