function login_submit(){
var a = document;
var user_email = a.getElementById("user_email").value;
var user_pass = a.getElementById("user_password").value;
var user_msg ;
var check_valid = true;
if(user_email=="" && user_pass == ""){
	user_msg="Please enter your user email & password.";
	check_valid = false;
}else if(user_email==""){
	user_msg="Please enter your user email.";
	check_valid = false;
}else if(user_pass==""){
	user_msg="Please enter your user password.";
	check_valid = false;
}
if(check_invalid_char(user_email) && check_invalid_char(user_pass)){
	user_msg= user_msg + "Invalid characters(symbols & spaces) not allowed in email & password.";
	check_valid = false;
}else if(check_invalid_char(user_email)){
	user_msg = user_msg + "Invalid characters(symbols & spaces) not allowed in email.";
	check_valid = false;
}else if(check_invalid_char(user_pass)){
	user_msg = user_msg + "Invalid characters(symbols & spaces) not allowed in password.";
	check_valid = false;
}

if(check_valid){
	return true;
}else{
	a.getElementById("user_msg").innerHTML = user_msg;
	return false;
}
}


function check_invalid_char(str){
str = escape(str);
str = "a" + str; //weird bug that, when str escape has first character as ? it does not work
var tester = str.search(/(<|>|{|}|%|\$|\+|\*|~|&)/);
//alert(tester);
if(tester >0){
return true;
}else{
return false;
}
}