window.onload = function(){
	
	var login_submit = document.getElementById("login_submit");
	
	var nav = document.getElementById("navx");
	var imgs = nav.getElementsByTagName("img");
	//var imgs = document.getElementsByName("x");
	
	for(var i = 0; i < imgs.length; i++){
	
		imgs[i].onmouseover = over;
		imgs[i].onmouseout = out;		
		preloader = new Image;
		preloader.src = imgs[i].src.replace(/normal/, "hover");
	}
	
	login_submit.onmouseover = over;	
	login_submit.onmouseout = out;	
	
}
function over(){
	this.src = this.src.replace(/normal/, "hover");
	this.style.cursor='pointer';
}
function out(){
	this.src = this.src.replace(/hover/, "normal");
}
function clearusername(){
	
	var username = document.getElementById("username");
	if(username.value == 'Username'){
		username.value = '';
	}
}
function clearpassword(){
	
	var password = document.getElementById("password");
	if(password.value == 'Password'){
		password.value = '';
	}
}
function submit_login(){
	
	var login_form = document.getElementById("login_form");
	login_form.submit();
}