function roll(imageName, imageState) {
	if (document.images && loaded == 1) {
		tabOn = eval(imageName+"_"+imageState+".src");
	  	document [imageName].src = tabOn;
	}
}

if (document.images) {

	//Entrance Navigation
		enternav01_off = new Image();enternav01_off.src ='images/entrance/tnav_01.gif';
		enternav01_on = new Image();enternav01_on.src ='images/entrance/tnav_01_on.gif';
		enternav02_off = new Image();enternav02_off.src ='images/entrance/tnav_02.gif';
		enternav02_on = new Image();enternav02_on.src ='images/entrance/tnav_02_on.gif';
		enternav03_off = new Image();enternav03_off.src ='images/entrance/tnav_03.gif';
		enternav03_on = new Image();enternav03_on.src ='images/entrance/tnav_03_on.gif';
		enternav04_off = new Image();enternav04_off.src ='images/entrance/tnav_04.gif';
		enternav04_on = new Image();enternav04_on.src ='images/entrance/tnav_04_on.gif';
		enternav05_off = new Image();enternav05_off.src ='images/entrance/tnav_05.gif';
		enternav05_on = new Image();enternav05_on.src ='images/entrance/tnav_05_on.gif';


	loaded = 1;
}