$().ready(function() {
	$("#s").focus(function() {
	if( this.value == this.defaultValue ) {
		this.value = "";
	}
	}).blur(function() {
		if( !this.value.length ) {
			this.value = this.defaultValue;
		}
	});

	$("#searchform").validate({
		rules: { 
				s: { required: true, minlength: 3 } 
		},
		messages: {
				s: {
				required: "Mindestlänge: 3 Zeichen",
				minlength: "Mindestlänge: 3 Zeichen"
		}
	}
	});
});