$(document).ready(function() {
    $('input.focus_value').focus(function(){
        var current_value = $(this).attr('value');
        var current_title = $(this).attr('title');
        
        if(current_value == current_title) {
            $(this).attr('value', '');
        }
    });
        
    $('input.focus_value').blur(function(){
        var current_value = $(this).attr('value');
        var current_title = $(this).attr('title');
        
        if(current_value == '') {
            $(this).attr('value', current_title);
        }
    });
});

function focusPincodeBox(){
	var el = document.getElementById("pincodebox");
	el.style.color = "#000";
	el.value = "";
} 

function blurPincodeBox(){
	var el = document.getElementById("pincodebox");
	if (el.value == ""){
		el.style.color = "#666";
		el.value = "type hier de pincode"
	}
}