// JavaScript Document                                                                                             
// Frömming + Struck GbR 
// ROCKmedia      
// Andreas-Gayk-Str. 7-11
// 24103 Kiel
// author: ROCKmedia / Germany / Kiel
// e-mail: info@rockmedia.de
        
var bg_small = "index.php?rex_img_type=background_small&rex_img_file=istock_000017088878large.jpg";var small_h = 750;var small_w = 1129;var bg_medium = "index.php?rex_img_type=background_medium&rex_img_file=istock_000017088878large.jpg";var medium_h = 1125;var medium_w = 1693;var bg_large = "index.php?rex_img_type=background_large&rex_img_file=istock_000017088878large.jpg";var large_h = 1500;var large_w = 2257;

var current_w = 0;
var current_h = 0;

function bgresize () {

	var winWidth = $(window).width(); 
	var winHeight = $(window).height(); 

    if( winWidth < 980 ) {
		$('#bgimage').attr('src', bg_small);
		current_w = small_w;
		current_h = small_h;
		
		$("#bgimage").css("margin-left","-" + current_w/2 + "px");
    	$("#bgimage").css("margin-top","-" + current_h/2 + "px"); 
    	 
	} else if ( winWidth < 1000 && winWidth < 2000 ) {
		$('#bgimage').attr('src', bg_medium);
		current_w = medium_w;
		current_h = medium_h;
		
		$("#bgimage").css("margin-left","-" + current_w/2 + "px");
    	$("#bgimage").css("margin-top","-" + current_h/2 + "px"); 
    	
	} 
	else {
		$('#bgimage').attr('src', bg_large);
		current_w = large_w;
		current_h = large_h;

		$("#bgimage").css("margin-left","-" + current_w/2 + "px");
    	$("#bgimage").css("margin-top","-" + current_h/2 + "px");
	}
}