img_cars= new Array();
img_cars[0]= new Image();
img_cars[0].src= "/images/mtm/cars_0_bentley.gif";
img_cars[1]= new Image();
img_cars[1].src= "/images/mtm/cars_1_bmw_5.gif";
img_cars[2]= new Image();
img_cars[2].src= "/images/mtm/cars_2_bmw_kabr.gif";
img_cars[3]= new Image();
img_cars[3].src= "/images/mtm/cars_3_bmw_m3.gif";
img_cars[4]= new Image();
img_cars[4].src= "/images/mtm/cars_4_ferrari.gif";
img_cars[5]= new Image();
img_cars[5].src= "/images/mtm/cars_5_hummer.gif";
img_cars[6]= new Image();
img_cars[6].src= "/images/mtm/cars_6_lexus.gif";
img_cars[7]= new Image();
img_cars[7].src= "/images/mtm/cars_7_mers.gif";
img_cars[8]= new Image();
img_cars[8].src= "/images/mtm/cars_8_mers3.gif";
img_cars[9]= new Image();
img_cars[9].src= "/images/mtm/cars_9_porsche.gif";
img_cars[10]= new Image();
img_cars[10].src= "/images/mtm/cars_10_x5.gif";

function change_cars(num) {
	cars_nums_regexp= new RegExp("cars_(\d+)_");
	cars_nums= new Array();
	cars_nums[0]= -1;

	function assign_num(a) {
		function is_in_nums(num) {
			for (i= 0; i< cars_nums.length; i++) {
				if (cars_nums[i]== num) {
					return true;
				}
			}
			return false;
		}

		result= -1;
		while (is_in_nums(result)) {
			result= Math.floor(img_cars.length* Math.random());
		}
		cars_nums[cars_nums.length]= result;
		return result;
	}
	function get_nums_used() {
		a= 0;
		while (document.getElementById("car_img_"+ a)!= null) {
			var src= document.getElementById("car_img_"+ a).src;
			var temp= new Array();
			temp= src.split("/mtm/cars_");
			src= ''+ temp[1]+ '';
			temp= src.split("_");
			src= ''+ temp[0]+ '';
			cars_nums[cars_nums.length]= src;
			a++;
		}
	}

	get_nums_used();
	document.getElementById("car_img_"+ num).src= img_cars[assign_num(num)].src;
}