function showsubmenu(id) {
	jQuery("#navigation").css("height", "80%");
	jQuery(".submenu").hide();
    jQuery("#submenu"+id).show();
}

function hidesubmenu(id) {
	jQuery("#navigation").css("height", "34px");
    jQuery("#submenu"+id).hide();
}

function clearField(form) {
    jQuery(form).find("input.text, textarea").each(function(){
        this.defaultValue = this.value;
        jQuery(this).click(function(){
            if(this.value == this.defaultValue){
                jQuery(this).val("");
            }
            return false;
        });
        jQuery(this).blur(function(){
            if(this.value == ""){
                jQuery(this).val(this.defaultValue);
            }
        });
    });
}


function bgPosition() {
	var window_height = jQuery('body').height();
	var window_width = $(window).width();

	var img_width = jQuery('#hintergrundwrapper img:visible').width();
	var img_height = jQuery('#hintergrundwrapper img:visible').height();

	var divHeight = window_height - 93;

	jQuery('#hintergrundwrapper').width(window_width);
	jQuery('#hintergrundwrapper').height(divHeight);

	var img_ratio = img_width / img_height;
	var window_ratio = window_width / divHeight;

    jQuery('#hintergrundwrapper img').width(window_width);
    var newHeight = window_width/img_ratio;
    jQuery('#hintergrundwrapper img').height(newHeight);

    /*

	if (window_ratio >= img_ratio) {
		jQuery('#hintergrundwrapper img').width(window_width);
		var newHeight = window_width/img_ratio;
		jQuery('#hintergrundwrapper img').height(newHeight);
	} else {
		jQuery('#hintergrundwrapper img').height(divHeight);
		var newWidth = img_ratio*divHeight;
		jQuery('#hintergrundwrapper img').width(newWidth);
	}
    */


}

function bgPositionHome() {
	var window_height = jQuery('body').height();
	var window_width = $(window).width();

	var img_width = jQuery('#hintergrundwrapper img:visible').width();
	var img_height = jQuery('#hintergrundwrapper img:visible').height();

	var divHeight = window_height;

	jQuery('#hintergrundwrapper').width(window_width);
	jQuery('#hintergrundwrapper').height(divHeight);

	var img_ratio = img_width / img_height;
	var window_ratio = window_width / divHeight;

    jQuery('#hintergrundwrapper img').width(window_width);
    var newHeight = window_width/img_ratio;
    jQuery('#hintergrundwrapper img').height(newHeight);
    
    /*
	if (window_ratio >= img_ratio) {
		jQuery('#hintergrundwrapper img').width(window_width);
		var newHeight = window_width/img_ratio;
		jQuery('#hintergrundwrapper img').height(newHeight);
	} else {
		jQuery('#hintergrundwrapper img').height(divHeight);
		var newWidth = img_ratio*divHeight;
		jQuery('#hintergrundwrapper img').width(newWidth);
	}
    */


}