var myimages=new Array();
	
function preloadImgs(){
	for (i=0;i<preloadImgs.arguments.length;i++){
		myimages[i]=new Image();
		myimages[i].src="images/" + preloadImgs.arguments[i];
	}
}

//preload left main nav
//preloadImgs("nav_profiles_on.gif", "nav_engineering_on.gif", "nav_artifacts_on.gif", "nav_videostories_on.gif", "nav_imagining_on.gif", "nav_dialogue_on.gif", "nav_about_on.gif");


function swapImg(img1,img2) {
	if (document.images) {
		document[img1].src = img2;
	}
}

function swapImg_enteredo(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["enteredo"+defaultnum].src = "images/enteredo_nav_"+defaultnum+"_off.jpg";
			}
			document["enteredo"+imgnum].src = "images/enteredo_nav_"+imgnum+"_on.jpg";
			document["enteredo_ro"].src = "images/enteredo_ro_"+imgnum+".gif";
		} else if (state=="off") {
			document["enteredo"+imgnum].src = "images/enteredo_nav_"+imgnum+"_off.jpg";
			if (defaultnum!=0) {
				document["enteredo"+defaultnum].src = "images/enteredo_nav_"+defaultnum+"_on.jpg";
			}
			document["enteredo_ro"].src = "images/enteredo_ro_"+defaultnum+".gif";
		}
	}
}

function swapImg_hp(imgnum,state) {
	if (document.images) {
		document["hp"+imgnum].src = "images/hp_ro_"+imgnum+"_"+state+".jpg";
		if (state == "on") {
			document["hp_ro"].src = "images/hp_ro_"+imgnum+".jpg";
		} else {
			document["hp_ro"].src = "images/hp_ro_0.jpg";
		}
	}
}

function swapImg_tokaido(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["tokaido"+defaultnum].src = "images/tokaido_nav_"+defaultnum+"_off.jpg";
			}
			document["tokaido"+imgnum].src = "images/tokaido_nav_"+imgnum+"_on.jpg";
			document["tokaido_ro"].src = "images/tokaido_ro_"+imgnum+".gif";
		} else if (state=="off") {
			document["tokaido"+imgnum].src = "images/tokaido_nav_"+imgnum+"_off.jpg";
			if (defaultnum!=0) {
				document["tokaido"+defaultnum].src = "images/tokaido_nav_"+defaultnum+"_on.jpg";
			}
			document["tokaido_ro"].src = "images/tokaido_ro_"+defaultnum+".gif";
		}
	}
}

function swapImg_resources(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["resources"+defaultnum].src = "images/resources_nav_"+defaultnum+"_off.jpg";
			}
			document["resources"+imgnum].src = "images/resources_nav_"+imgnum+"_on.jpg";
			document["resources_ro"].src = "images/resources_ro_"+imgnum+".gif";
		} else if (state=="off") {
			document["resources"+imgnum].src = "images/resources_nav_"+imgnum+"_off.jpg";
			if (defaultnum!=0) {
				document["resources"+defaultnum].src = "images/resources_nav_"+defaultnum+"_on.jpg";
			}
			document["resources_ro"].src = "images/resources_ro_"+defaultnum+".gif";
		}
	}
}

function swapImg_program(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["program"+defaultnum].src = "images/program_nav_"+defaultnum+"_off.jpg";
			}
			document["program"+imgnum].src = "images/program_nav_"+imgnum+"_on.jpg";
			document["program_ro"].src = "images/program_ro_"+imgnum+".gif";
		} else if (state=="off") {
			document["program"+imgnum].src = "images/program_nav_"+imgnum+"_off.jpg";
			if (defaultnum!=0) {
				document["program"+defaultnum].src = "images/program_nav_"+defaultnum+"_on.jpg";
			}
			document["program_ro"].src = "images/program_ro_"+defaultnum+".gif";
		}
	}
}

function swapImg_timeline(imgnum,state,defaultnum) {
	if (document.images) {
		if (state=="on") {
			if (defaultnum!=0) {
				document["timeline"+defaultnum].src = "images/timeline_nav_"+defaultnum+"_off.jpg";
			}
			document["timeline"+imgnum].src = "images/timeline_nav_"+imgnum+"_on.jpg";
			document["timeline_ro"].src = "images/timeline_ro_"+imgnum+".gif";
		} else if (state=="off") {
			document["timeline"+imgnum].src = "images/timeline_nav_"+imgnum+"_off.jpg";
			if (defaultnum!=0) {
				document["timeline"+defaultnum].src = "images/timeline_nav_"+defaultnum+"_on.jpg";
			}
			document["timeline_ro"].src = "images/timeline_ro_"+defaultnum+".gif";
		}
	}
}