function navi() {
	this.ie4 = document.all ? 1 : 0;
	this.nn4 = document.layers ? 1 : 0;
	this.nn6 = document.getElementById && !document.all? 1 : 0;
	this.op5 = document.all && navigator.userAgent.indexOf('Opera') != -1 ? 1 : 0;

	if (document.body) {

		if (document.body.clientWidth)
			this.width = document.body.clientWidth;
		else if (window.innerWidth)
			this.width = window.innerWidth;
		if (document.body.clientHeight)
			this.height = document.body.clientHeight;
		else if (window.innerHeight)
			this.height = window.innerHeight;
		
		if (document.body.scrollLeft)
			this.scrollLeft = document.body.scrollLeft;
		else if (window.pageXOffset)
			this.scrollLeft = window.pageXOffset;
		if (document.body.scrollTop)
			this.scrollTop = document.body.scrollTop;
		else if (window.pageXOffset)
			this.scrollTop = window.pageYOffset;
		
		if (document.body.scrollWidth)
			this.scrollWidth = document.body.scrollWidth;
		if (document.body.scrollHeight)
			this.scrollHeight = document.body.scrollHeight;
	
		if (document.body.offsetWidth)
			this.offsetWidth = document.body.offsetWidth;
		if (document.body.offsetHeight)
			this.offsetHeight = document.body.offsetHeight;

	}
		
	this.getonload = getonload;
	this.addonload = addonload;
	this.addevent = addevent;
	
	this.addonunload = addonunload;
	
	function getonload() {
		if (window.onload != null) {
			we = window.onload.toString();
			st = we.indexOf('{');
			en = we.lastIndexOf('}');
			if (st != -1 && en != -1)
				return new Array(we.substring(0, st + 1), we.substring(st + 1, en), we.substring(en, we.length)); 
		}
		return new Array('', '', '');
	}
	
	function addonload(code) {
		this.addevent(window, 'load', (typeof code == 'function' ? code : new Function(code)));
	}
	
	function addonunload(code) {
		this.addevent(window, 'unload', (typeof code == 'function' ? code : new Function(code)));
	}
	
	function addevent(el, evname, func) {
		if (this.ie4) {
			el.attachEvent("on" + evname, func);
		} else {
			el.addEventListener(evname, func, true);
		}
	}
}

function getobj(name, iframe) {
	base = (typeof(iframe) == 'string' ? getobj(iframe).contentWindow : window);
	nav = new navi();
	if (nav.nn4) {
		return base.document.layers[name];
	} else if (nav.nn6) {
		return base.document.getElementById(name);
	} else {
		return base.document.all[name];
	}
}

function getevalobj(name) {
	nav = new navi();
	if (nav.nn4) {
		return 'document.layers[\'' + name + '\']';
	} else if (nav.nn6) {
		return 'document.getElementById(\'' + name + '\')';
	} else {
		return 'document.all[\'' + name + '\']';
	}
}

function getcss(obj) {
	nav = new navi();
	if (nav.nn4) {
		return obj;
	} else {
		return obj.style;
	}
}

function getevalcss() {
	nav = new navi();
	if (nav.nn4) {
		return '';
	} else {
		return '.style';
	}
}

function getsevalobj(name) {
	nav = new navi();
	if (nav.nn4) {
		return 'document.layers[\\\'' + name + '\\\']';
	} else if (nav.nn6) {
		return 'document.getElementById(\\\'' + name + '\\\')';
	} else {
		return 'document.all[\\\'' + name + '\\\']';
	}
}

function objswitch(css, force) {
	if (css.display == 'none' && typeof(force) == 'undefined' || force == true) {
		css.display = '';
		return;
	}
	if (css.display == '' && typeof(force) == 'undefined' || force != true) {
		css.display = 'none';
		return;
	}
}

function objevalswitch(obj, val) {
	if (css = getcss(getobj(obj))) {
		if ((css.display == 'none' && typeof(val) == 'undefined') || (typeof(val) != 'undefined' && val == true)) {
			css.display = '';
		} else {
			css.display = 'none';
		}
	}
}

function objhide(css) {
	css.display = 'none';
}

function objshow(css) {
	css.display = 'inline';
}