// JavaScript Document

//////////////////////////////////////////
// GENERAL								//
//////////////////////////////////////////

// test if object is valid
function object_exist(object_) {
	if (null == object_ || "undefined" == typeof(object_)) {
		return false;
	}
	return true;
}


///////////////////////////////////
// funktion for image buttons /////
///////////////////////////////////

// preload images
function BilderVorladen() {
    document.Vorladen = new Array();
    if(document.images) {
        for(var i = 0; i < BilderVorladen.arguments.length; i++) {
            document.Vorladen[i] = new Image();
            document.Vorladen[i].src = BilderVorladen.arguments[i];
        }
    }
}

BilderVorladen('../images/bg_button_left_active.gif','../images/bg_button_right_active.gif')

function btn_mouse_over(id_left,id_right) {
	document.getElementById(id_left).className = 'td_button_left_active'
	document.getElementById(id_right).className = 'td_button_right_active'
}

function btn_mouse_out(id_left,id_right) {
	document.getElementById(id_left).className = 'td_button_left_inactive'
	document.getElementById(id_right).className = 'td_button_right_inactive'
}

// end ////////////////////////////