function signIn(){
// Make quick references to our fields
    var strUser = document.getElementById("txtUser");
    var strPass = document.getElementById("txtPass");
	
// Check each input in the order that it appears in the form!
    if(isNotEmpty(strUser, "You must enter a User Name")){
      if(lengthRestriction(strUser, 1, 15, "User Name must be between 1 and 15 characters long")){
        if(isNotEmpty(strPass, "You must enter a Password")){
          if(lengthRestriction(strPass, 1, 15,"Password must be between 1 and 15 characters long")){    
            if (isAlphanumeric(strUser, "User Name Invalid")){
              if(isAlphanumeric(strPass, "Password invalid")){
                createCookie("User", strUser.value, 1);
                createCookie("Pass", strPass.value, 1);
                window.location.href = "../../Reg/signIn.asp";
              }
            }
          }
        }
      }
    }
    return false;
}

function isNotEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}
	return true;
}

function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isAlphabet(elem, helperMsg){
	var alphaExp = /^[a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isAlphanumeric(elem, helperMsg){
	var alphaExp = /^[0-9a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function lengthRestriction(elem, min, max, msg){
	var uInput = elem.value;
        var uMsg = msg
	if(uInput.length >= min && uInput.length <= max){
		return true;
	}else{
		alert(uMsg);
		elem.focus();
		return false;
	}
}

function madeSelection(elem, helperMsg){
	if(elem.value == "Please Choose"){
		alert(helperMsg);
		elem.focus();
		return false;
	}else{
		return true;
	}
}

function emailValidator(elem, helperMsg){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.value.match(emailExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}