$(document).ready(function()  {
	$('#search_field').focus(function() {
		if($('#search_field').val() == "Suchbegriff eingeben") {
			$('#search_field').val(""); 
		}
	});
	$('#search_field').blur(function() {
		if($('#search_field').val() == "") {
			$('#search_field').val("Suchbegriff eingeben");	
		}
	});
});