String.prototype.trim = function () {
    	return this.replace(/^\s*/, "").replace(/\s*$/, "");
	}

	function changeInputType(oldObject, oType) {
  		var newObject = document.createElement('input');
	  	newObject.type = oType;
  		if(oldObject.size) newObject.size = oldObject.size;
  		if(oldObject.value) newObject.value = oldObject.value;
  		if(oldObject.name) newObject.name = oldObject.name;
  		if(oldObject.id) newObject.id = oldObject.id;
  		if(oldObject.className) newObject.className = oldObject.className;
		if(oldObject.onfocus) newObject.onfocus = oldObject.onfocus; 
		if(oldObject.onblur) newObject.onblur = oldObject.onblur;
  		oldObject.parentNode.replaceChild(newObject,oldObject);
  		return newObject;
	}

	var usernameDefaultValue = "Member ID";
	var passwordDefaultValue = "Password";


	function usernameOnFocus() {
		var usernameCtrl = document.getElementById("username");
		if(usernameCtrl.value.toString() == usernameDefaultValue) {
			usernameCtrl.value = "";
		}
	}

	function usernameOnBlur() {
		var usernameCtrl = document.getElementById("username");
		if(usernameCtrl.value.toString().trim().length == 0) {
			usernameCtrl.value = usernameDefaultValue;
		}
	}

	function passwordOnFocus() {
		var passwordCtrl = document.getElementById("password");
		if(passwordCtrl.value.toString() == passwordDefaultValue) {
			passwordCtrl.value = "";
			try {
				passwordCtrl.type="password";
			} catch(e) {
				passwordCtrl = changeInputType(passwordCtrl, "password");
			}
			passwordCtrl.select();
			passwordCtrl.focus();
		}
	}

	function passwordOnBlur() {		
		var passwordCtrl = document.getElementById("password");
		if(passwordCtrl.value.toString().trim().length == 0) {			
			passwordCtrl.value = passwordDefaultValue;
			try {
				passwordCtrl.type="text";
			} catch(e) {
				changeInputType(passwordCtrl, "text");
			}				
		}
	}

	function usernameOnLoad() {
		var usernameCtrl = document.getElementById("username");
		usernameCtrl.value = usernameDefaultValue;
		usernameCtrl.onfocus=usernameOnFocus;
		usernameCtrl.onblur=usernameOnBlur;
	}

	function passwordOnLoad() {
		var passwordCtrl = document.getElementById("password");
		passwordCtrl.value = passwordDefaultValue;
		passwordCtrl.onfocus=passwordOnFocus;
		passwordCtrl.onblur=passwordOnBlur;

		try {
			passwordCtrl.type="text";
		} catch(e) {
			changeInputType(passwordCtrl, "text");
		}
	}

	function setupAuthForm() {
		usernameOnLoad();
		passwordOnLoad();
	}