//Identify page and produce appropriate menu

function locate(){
	var location = window.location.href;
	location = location.substring(location.lastIndexOf("/")+1, location.lastIndexOf("."));
	
	var obj = document.getElementById(location + "_topLink");
	obj.firstChild.style.color = "#fff";
	switch (location){
		case "index":
		obj.firstChild.style.background = "url(images/site_design/nav_bg.jpg) left top";
		break;
		
		case "page1":
		obj.firstChild.style.background = "url(images/site_design/nav_bg.jpg) -100px top";
		break;
		
		case "page2":
		obj.firstChild.style.background = "url(images/site_design/nav_bg.jpg) -200px top";
		break;
		
		case "page3":
		obj.firstChild.style.background = "url(images/site_design/nav_bg.jpg) -300px top";
		break;
		
		case "contact":
		obj.firstChild.style.background = "url(images/site_design/nav_bg.jpg) -400px top";
		break;
	}
}