//************************************************************************** //=== THE CODE STARTS HERE - no need to change anything below === //=== global variables ==== theImages = new Array(); //holds the images imageNum = new Array(); //keeps track of which images to omit from loop normal_delay = 1000; delay = normal_delay; //delay between frames in 1/100 seconds delay_step = 50; delay_max = 6000; delay_min = 50; dwell_multipler = 3; dwell_step = 1; end_dwell_multipler = dwell_multipler; start_dwell_multipler = dwell_multipler; current_image = first_image; //number of the current image timeID = null; status = 0; // 0-stopped, 1-playing play_mode = 0; // 0-normal, 1-loop, 2-sweep size_valid = 0; //===> Make sure the first image number is not bigger than the last image number if (first_image > last_image) { var help = last_image; last_image = first_image; first_image = help; } //===> Preload the first image (while page is downloading) theImages[0] = new Image(); theImages[0].src = modImages[0]; imageNum[0] = true; //============================================================== //== All previous statements are performed as the page loads. == //== The following functions are also defined at this time. == //============================================================== //===> Stop the animation function stop() { //== cancel animation (timeID holds the expression which calls the fwd or bkwd function) == if (status == 1) clearTimeout (timeID); status = 0; } //===> Display animation in fwd direction in either loop or sweep mode function animate_fwd() { current_image++; //increment image number //== check if current image has exceeded loop bound == if (current_image > last_image) { if (play_mode == 1) { //fwd loop mode - skip to first image current_image = first_image; } if (play_mode == 2) { //sweep mode - change directions (go bkwd) current_image = last_image; animate_rev(); return; } } //== check to ensure that current image has not been deselected from the loop == //== if it has, then find the next image that hasn't been == while (imageNum[current_image-first_image] == false) { current_image++; if (current_image > last_image) { if (play_mode == 1) current_image = first_image; if (play_mode == 2) { current_image = last_image; animate_rev(); return; } } } document.animation.src = theImages[current_image-first_image].src; //display image onto screen document.control_form.frame_nr.value = current_image; //display image number delay_time = delay; if ( current_image == first_image) delay_time = start_dwell_multipler*delay; if (current_image == last_image) delay_time = end_dwell_multipler*delay; //== call "animate_fwd()" again after a set time (delay_time) has elapsed == timeID = setTimeout("animate_fwd()", delay_time); } //===> Display animation in reverse direction function animate_rev() { current_image--; //decrement image number //== check if image number is before lower loop bound == if (current_image < first_image) { if (play_mode == 1) { //rev loop mode - skip to last image current_image = last_image; } if (play_mode == 2) { current_image = first_image; //sweep mode - change directions (go fwd) animate_fwd(); return; } } //== check to ensure that current image has not been deselected from the loop == //== if it has, then find the next image that hasn't been == while (imageNum[current_image-first_image] == false) { current_image--; if (current_image < first_image) { if (play_mode == 1) current_image = last_image; if (play_mode == 2) { current_image = first_image; animate_fwd(); return; } } } document.animation.src = theImages[current_image-first_image].src; //display image onto screen document.control_form.frame_nr.value = current_image; //display image number delay_time = delay; if ( current_image == first_image) delay_time = start_dwell_multipler*delay; if (current_image == last_image) delay_time = end_dwell_multipler*delay; //== call "animate_rev()" again after a set amount of time (delay_time) has elapsed == timeID = setTimeout("animate_rev()", delay_time); } //===> Changes playing speed by adding to or substracting from the delay between frames function change_speed(dv) { delay+=dv; //== check to ensure max and min delay constraints have not been crossed == if(delay > delay_max) delay = delay_max; if(delay < delay_min) delay = delay_min; } //===> functions that changed the dwell rates. function change_end_dwell(dv) { end_dwell_multipler+=dv; if ( end_dwell_multipler < 1 ) end_dwell_multipler = 0; } function change_start_dwell(dv) { start_dwell_multipler+=dv; if ( start_dwell_multipler < 1 ) start_dwell_multipler = 0; } //===> Increment to next image function incrementImage(number) { stop(); //== if image is last in loop, increment to first image == if (number > last_image) number = first_image; //== check to ensure that image has not been deselected from loop == while (imageNum[number-first_image] == false) { number++; if (number > last_image) number = first_image; } current_image = number; document.animation.src = theImages[current_image-first_image].src; //display image document.control_form.frame_nr.value = current_image; //display image number } //===> Decrement to next image function decrementImage(number) { stop(); //== if image is first in loop, decrement to last image == if (number < first_image) number = last_image; //== check to ensure that image has not been deselected from loop == while (imageNum[number-first_image] == false) { number--; if (number < first_image) number = last_image; } current_image = number; document.animation.src = theImages[current_image-first_image].src; //display image document.control_form.frame_nr.value = current_image; //display image number } //===> "Play forward" function fwd() { stop(); status = 1; play_mode = 1; animate_fwd(); } //===> "Play reverse" function rev() { stop(); status = 1; play_mode = 1; animate_rev(); } //===> "play sweep" function sweep() { stop(); status = 1; play_mode = 2; animate_fwd(); } //===> Change play mode (normal, loop, swing) function change_mode(mode) { play_mode = mode; } //===> Load and initialize everything once page is downloaded (called from 'onLoad' in
) function launch() { for (var i = first_image + 1; i <= last_image; i++) { theImages[i-first_image] = new Image(); theImages[i-first_image].src = modImages[i-first_image]; imageNum[i-first_image] = true; document.animation.src = theImages[i-first_image].src; document.control_form.frame_nr.value = i; } // this needs to be done to set the right mode when the page is manually reloaded change_mode (1); fwd(); } //===> Check selection status of image in animation loop function checkImage(status,i) { if (status == true) imageNum[i] = false; else imageNum[i] = true; } //==> Empty function - used to deal with image buttons rather than HTML buttons function func() { } //===> Sets up interface - this is the one function called from the HTML body function animation() { count = first_image; } // --> function MM_jumpMenu(targ,selObj,restore){ //v3.0 eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'"); if (restore) selObj.selectedIndex=0; } //-->

Play Mode: Adjust Speed: Advance One Frame: Frame No: Back About the LMD Mesoscale Model Mars Climate Database |