function getQueryVariable(variable) {
    var query   = window.location.search.substring(1);
    var vars    = query.split("&");
    
    for (var i=0;i<vars.length;i++) {
        var pair = vars[i].split("=");
        if (pair[0] == variable) {
            return pair[1];
        }
    }
    return 0;
}

function focusSearch(object) {
	if (object.value == 'zoekterm:') {
		object.value = '';
	}
}

function blurSearch(object) {
	if (object.value == '') {
		object.value = 'zoekterm:';
	}
}

function submitSearch(object) {
	var target = object.elements['search_string'].value;

	var int_pos = target.indexOf(':');
	if (int_pos != -1) {
		target = target.substr(int_pos+1, target.length);
	}

	if (target == '') {
		alert('Je bent vergeten in te vullen waar je naar zoekt!');
		object.search_string.focus();
		return false;
	} else {
		if (search_dest !== undefined) {
			//window.location = search_dest + target;
			window.open(search_dest + target);
			return false;
		}

		object.search_string.value = target;
		return true;
	}
}