img1_exist = true; function set_img1() { if(img1_width0) { img1_width = img_file1.width; } set_img('img_file1',img1_width,contents.offsetWidth) }

img2_exist = true; function set_img2() { if(img2_width0) { img2_width = img_file2.width; } set_img('img_file2',img2_width,contents.offsetWidth) }