// enables rollovers to png images through the addition of a "rollover" class; TODO - developed in Amend; check with all browsers
doRollovers = function() {
	var nodes = new Array();
	var elems = document.getElementsByTagName('*');
	var pattern = new RegExp("(^|\\s)rollover(\\s|$)");
	for (i = 0, j = 0; i < elems.length; i++) {
		if (pattern.test(elems[i].className)) {
			nodes[j] = elems[i];
			j++;
		}
	}

	for (var x = 0; x < nodes.length; x++) {
		nodes[x].style.cursor = "pointer";
		var left = nodes[x].src.substring(0, nodes[x].src.indexOf(".png"));
		var right = nodes[x].src.substring(nodes[x].src.indexOf(".png"), nodes[x].src.length);

		var img = new Image();
		img.src = node.src;
		var rimg = new Image();
		rimg.src = left + "-over" + right;

		nodes[x].onmouseover = function() { nodes[x].src = rimg.src; }
		nodes[x].onmouseout = function() { nodes[x].src = img.src; }
	}
}

//font size functions
function setCookie(name, value, expires, path, domain, secure) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime(today.getTime());

	if (expires) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date(today.getTime() + (expires));
	
	document.cookie = name + "=" +escape( value ) +
	(( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + 
	(( path ) ? ";path=" + path : "" ) + 
	(( domain ) ? ";domain=" + domain : "" ) +
	(( secure ) ? ";secure" : "" );
} // setCookie

function getCookie(name) {
	var start = document.cookie.indexOf(name + "=");
	var len = start + name.length + 1;
	if ((!start) && (name != document.cookie.substring(0, name.length ))) {
		return null;
	}
	if (start == -1) return null;
	var end = document.cookie.indexOf( ";", len );
	if (end == -1) end = document.cookie.length;
	return unescape(document.cookie.substring(len, end));
} // getCookie

function loadPageFont() {
	if(getCookie("font_size")) {
		fs = getCookie("font_size");
		alert(fs);
		setPageFont(fs);
	}
} // loadPageFont

function setPageFont(which) {
	var c = "";
	var bc = document.body.className;
	if (bc != "") {
		var classes = bc.split(" ");
		for (var x = 0; x < classes.length; x++) {
			if (classes[x].indexOf("font-") == -1) {
				c += classes[x] + " ";
			}	
		}
	}
	
	if (which != "") {
		c += "font-" + which;
	}
	
	document.body.className = c;

	var domain = application_webroot.substring(application_webroot.indexOf("http://") + 7, application_webroot.length - 1);
	setCookie("font_size", which, 1, "/", domain, false);
} // setPageFont

function init() {
	if (document.all) {
		nav_root = document.getElementById("navigation").firstChild;
		for (i = 0; i < nav_root.childNodes.length; i++) {
			node = nav_root.childNodes[i];
			if (node.id && node.id.indexOf("nav-") != -1) {
				node.onmouseover = function() { this.className += " hover"; }
				node.onmouseout = function() { this.className = this.className.replace(" hover", ""); }
			}
		}
	} // adds and removes 'hover' class to the nav li elements for ie

	doRollovers(); // adds rollover states for any png images with a class of 'rollover'
	loadPageFont();
}

// placeholder for form submits during dev
function returnfalse() { return false; }


// misc window opening functions

//leaving the senate servers so we have to display this message:
function openWin(urlToOpen) {
	window.open("http://www.senate.gov/cgi-bin/exitmsg?url=" + urlToOpen);	
}

//leaving the current site, but staying on senate servers.
function openSenateWin(urlToOpen) {
	window.open(urlToOpen);	
}