I have a Edit/Details form which has 4 user related fields. On click of Save, I save the edited fields to local storage (if supported) and display the same values in the Details view.

Below is the code which does that;

HTML Code:
      var UserDataObj = {
    name:"John",
    email:"john@example.com",
    phone:"9999999999",
    desc:"some description"
    }
    
    /**
     * Check HTML5 Local Storage support
     */
    function supports_html5_storage() 
    {
        try {
            window.localStorage.setItem( 'checkLocalStorage', true );
            return true;
        } catch ( error ) {
            return false;
        };
    };
    
    /**
     * Save form data to local storage
     */
    function saveFormData()
    {
    	if (supports_html5_storage())
    	{
    	$(".formFieldUserData").each(function(){
    		UserDataObj[$(this).attr("name")] = $(this).val();
    	});
    	
    	localStorage.setItem('UserDataObj', JSON.stringify(UserDataObj));	
    	}
    }
    
    
    /**
     * Set field values based on local storage
     */
    function setFormFieldValues()
    {
    	if (supports_html5_storage())
    	{
    			var retrievedUserDataObj = JSON.parse(localStorage.getItem('UserDataObj'));
    			if(retrievedUserDataObj)
    			{
    				$(".formFieldUserData").each(function(){
    					var currentKey = $(this).attr("name");
    					var retrievedValue = retrievedUserDataObj[$(this).attr("name")]
    					$("#"+currentKey).val(retrievedValue);
    					$("#"+currentKey+"Txt").html(retrievedValue);
    				});
    			}
    			else
    			{
    				$(".formFieldUserData").each(function(){
    					var currentKey = $(this).attr("name");
    					var userDataObjValue = UserDataObj[$(this).attr("name")]
    					$("#"+currentKey).val(userDataObjValue);
    					$("#"+currentKey+"Txt").html(userDataObjValue);
    				});
    			}
    	}
    	else
    	{
    		$(".formFieldUserData").each(function(){
    		var currentKey = $(this).attr("name");
    			if ($(this).val() != "")
    			{
    			var fieldValue = $(this).val();
    			$("#"+currentKey).val(fieldValue);
    			$("#"+currentKey+"Txt").html(fieldValue);
    			}	
    			else
    			{
    			var defaultuserDataObjValue = UserDataObj[$(this).attr("name")];
    			$("#"+currentKey).val(defaultuserDataObjValue);
    			$("#"+currentKey+"Txt").html(defaultuserDataObjValue);
    			}
    		})
    	}
    }
My question is;
1. This is a completely working code. But is there any further that I can do as far as best coding practices go.
2. Also performance wise, can I do anything to improve the overall code ?

Thank you.