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  1. #1
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    need help with js image on page load

    Hello, I am pretty new to js but not new to coding. I am trying to make the thickbox plugin (uses jquery lib) load the first image on page load. As it is, the thickbox image viewer starts on a mouse click event. i want it to start when teh page loads.

    So far I have only been able to accomplish loading the 1st image but it was outside the scope of the main function i guess because the "next image" button didn't work and all the variables i tried calling wouldn't work so i just cheated and used the static values . If anyone could help or point me in the right direction that would be awesome.... thanks peoples!

  • #2
    Supreme Master coder! Old Pedant's Avatar
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    Well, you don't show any code, so it's purely a guess, but...

    Why not just invoke the click event, by hand.

    You say it starts "on a mouse click event." You mean a click ANY place on the page??? Or just in a specific field on the page??

    If it's a specific field, then just do something like:
    Code:
    <body onload="document.getElementById('somefieldID').click( );">
    I do this all the time to get complex actions started off when the page loads.

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    eljhongo (06-24-2009)

  • #3
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    sorry about not posting the code, like i said it's the thickbox plugin that i want to make load the first image of the given library, as you can see it's when the user clicks on the thumbnail/image that the gal does it's magic, the on click is where it gets all it's information... the gallery is created dynamically so i can't just say gallery (insert static gallery name here) or what have you....

    Code:
    /*
     * Thickbox 3.1 - One Box To Rule Them All.
     * By Cody Lindley (http://www.codylindley.com)
     * Copyright (c) 2007 cody lindley
     * Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php
    */
          
    var tb_pathToImage = "images/loadingAnimation.gif";
    /*!!!!!!!!!!!!!!!!! edit below this line at your own risk !!!!!!!!!!!!!!!!!!!!!!!*/
    //on page load call tb_init
    $(document).ready(function(){   
      tb_init('a.thickbox, area.thickbox, input.thickbox');//pass where to apply thickbox
      imgLoader = new Image();// preload image
      imgLoader.src = tb_pathToImage;
    });
    //add thickbox to href & area elements that have a class of .thickbox
    function tb_init(domChunk){
      $(domChunk).click(function(){
      var t = this.title || this.name || null;
      var a = this.href || this.alt;
      var g = this.rel || false;
      tb_show(t,a,g);
      this.blur();
      return false;
      });
    }
    function tb_show(caption, url, imageGroup) {//function called when the user clicks on a thickbox link
      try {
        if (typeof document.body.style.maxHeight === "undefined") {//if IE 6
          $("body","html").css({height: "100%", width: "100%"});
          $("html").css("overflow","hidden");
          if (document.getElementById("TB_HideSelect") === null) {//iframe to hide select elements in ie6
            $("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
            $("#TB_overlay").click(tb_remove);
          }
        }else{//all others
          if(document.getElementById("TB_overlay") === null){
            $("body").append("<div id='TB_overlay'></div><div id='TB_window'></div>");
            $("#TB_overlay").click(tb_remove);
          }
        }
        
        if(tb_detectMacXFF()){
          $("#TB_overlay").addClass("TB_overlayMacFFBGHack");//use png overlay so hide flash
        }else{
          $("#TB_overlay").addClass("TB_overlayBG");//use background and opacity
        }
        
        if(caption===null){caption="";}
        $("body").append("<div id='TB_load'><img src='"+imgLoader.src+"' /></div>");//add loader to the page
        $('#TB_load').show();//show loader
        
        var baseURL;
         if(url.indexOf("?")!==-1){ //ff there is a query string involved
          baseURL = url.substr(0, url.indexOf("?"));
         }else{ 
             baseURL = url;
         }
         
         var urlString = /\.jpg$|\.jpeg$|\.png$|\.gif$|\.bmp$/;
         var urlType = baseURL.toLowerCase().match(urlString);
        if(urlType == '.jpg' || urlType == '.jpeg' || urlType == '.png' || urlType == '.gif' || urlType == '.bmp'){//code to show images
            
          TB_PrevCaption = "";
          TB_PrevURL = "";
          TB_PrevHTML = "";
          TB_NextCaption = "";
          TB_NextURL = "";
          TB_NextHTML = "";
          TB_imageCount = "";
          TB_FoundURL = false;
          if(imageGroup){
            TB_TempArray = $("a[@rel="+imageGroup+"]").get();
            for (TB_Counter = 0; ((TB_Counter < TB_TempArray.length) && (TB_NextHTML === "")); TB_Counter++) {
              var urlTypeTemp = TB_TempArray[TB_Counter].href.toLowerCase().match(urlString);
                if (!(TB_TempArray[TB_Counter].href == url)) {            
                  if (TB_FoundURL) {
                    TB_NextCaption = TB_TempArray[TB_Counter].title;
                    TB_NextURL = TB_TempArray[TB_Counter].href;
                    TB_NextHTML = "<span id='TB_next'>&nbsp;&nbsp;<a href='#'>Next &gt;</a></span>";
                  } else {
                    TB_PrevCaption = TB_TempArray[TB_Counter].title;
                    TB_PrevURL = TB_TempArray[TB_Counter].href;
                    TB_PrevHTML = "<span id='TB_prev'>&nbsp;&nbsp;<a href='#'>&lt; Prev</a></span>";
                  }
                } else {
                  TB_FoundURL = true;
                  TB_imageCount = "Image " + (TB_Counter + 1) +" of "+ (TB_TempArray.length);                      
                }
            }
          }
          imgPreloader = new Image();
          imgPreloader.onload = function(){    
          imgPreloader.onload = null;
            
          // Resizing large images - orginal by Christian Montoya edited by me.
          var pagesize = tb_getPageSize();
          var x = pagesize[0] - 150;
          var y = pagesize[1] - 150;
          var imageWidth = imgPreloader.width;
          var imageHeight = imgPreloader.height;
          if (imageWidth > x) {
            imageHeight = imageHeight * (x / imageWidth); 
            imageWidth = x; 
            if (imageHeight > y) { 
              imageWidth = imageWidth * (y / imageHeight); 
              imageHeight = y; 
            }
          } else if (imageHeight > y) { 
            imageWidth = imageWidth * (y / imageHeight); 
            imageHeight = y; 
            if (imageWidth > x) { 
              imageHeight = imageHeight * (x / imageWidth); 
              imageWidth = x;
            }
          }
          // End Resizing
          
          TB_WIDTH = imageWidth + 30;
          TB_HEIGHT = imageHeight + 60;
          $("#TB_window").append("<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + TB_imageCount + TB_PrevHTML + TB_NextHTML + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key</div>");     
          
          $("#TB_closeWindowButton").click(tb_remove);
          
          if (!(TB_PrevHTML === "")) {
            function goPrev(){
              if($(document).unbind("click",goPrev)){$(document).unbind("click",goPrev);}
              $("#TB_window").remove();
              $("body").append("<div id='TB_window'></div>");
              tb_show(TB_PrevCaption, TB_PrevURL, imageGroup);
              return false;  
            }
            $("#TB_prev").click(goPrev);
          }
          
          if (!(TB_NextHTML === "")) {    
            function goNext(){
              $("#TB_window").remove();
              $("body").append("<div id='TB_window'></div>");
              tb_show(TB_NextCaption, TB_NextURL, imageGroup);        
              return false;  
            }
            $("#TB_next").click(goNext);
            
          }
          document.onkeydown = function(e){   
            if (e == null) { // ie
              keycode = event.keyCode;
            } else { // mozilla
              keycode = e.which;
            }
            if(keycode == 27){ // close
              tb_remove();
            } else if(keycode == 190){ // display previous image
              if(!(TB_NextHTML == "")){
                document.onkeydown = "";
                goNext();
              }
            } else if(keycode == 188){ // display next image
              if(!(TB_PrevHTML == "")){
                document.onkeydown = "";
                goPrev();
              }
            }  
          };
          
          tb_position();
          $("#TB_load").remove();
          $("#TB_ImageOff").click(tb_remove);
          $("#TB_window").css({display:"block"}); //for safari using css instead of show
          };
          
          imgPreloader.src = url;
        }else{//code to show html
          
          var queryString = url.replace(/^[^\?]+\??/,'');
          var params = tb_parseQuery( queryString );
          TB_WIDTH = (params['width']*1) + 30 || 630; //defaults to 630 if no paramaters were added to URL
          TB_HEIGHT = (params['height']*1) + 40 || 440; //defaults to 440 if no paramaters were added to URL
          ajaxContentW = TB_WIDTH - 30;
          ajaxContentH = TB_HEIGHT - 45;
          
          if(url.indexOf('TB_iframe') != -1){// either iframe or ajax window    
              urlNoQuery = url.split('TB_');
              $("#TB_iframeContent").remove();
              if(params['modal'] != "true"){//iframe no modal
                $("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key</div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent"+Math.round(Math.random()*1000)+"' onload='tb_showIframe()' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' > </iframe>");
              }else{//iframe modal
              $("#TB_overlay").unbind();
                $("#TB_window").append("<iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent"+Math.round(Math.random()*1000)+"' onload='tb_showIframe()' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;'> </iframe>");
              }
          }else{// not an iframe, ajax
              if($("#TB_window").css("display") != "block"){
                if(params['modal'] != "true"){//ajax no modal
                $("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a> or Esc Key</div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px'></div>");
                }else{//ajax modal
                $("#TB_overlay").unbind();
                $("#TB_window").append("<div id='TB_ajaxContent' class='TB_modal' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");  
                }
              }else{//this means the window is already up, we are just loading new content via ajax
                $("#TB_ajaxContent")[0].style.width = ajaxContentW +"px";
                $("#TB_ajaxContent")[0].style.height = ajaxContentH +"px";
                $("#TB_ajaxContent")[0].scrollTop = 0;
                $("#TB_ajaxWindowTitle").html(caption);
              }
          }
              
          $("#TB_closeWindowButton").click(tb_remove);
          
            if(url.indexOf('TB_inline') != -1){  
              $("#TB_ajaxContent").append($('#' + params['inlineId']).children());
              $("#TB_window").unload(function () {
                $('#' + params['inlineId']).append( $("#TB_ajaxContent").children() ); // move elements back when you're finished
              });
              tb_position();
              $("#TB_load").remove();
              $("#TB_window").css({display:"block"}); 
            }else if(url.indexOf('TB_iframe') != -1){
              tb_position();
              if($.browser.safari){//safari needs help because it will not fire iframe onload
                $("#TB_load").remove();
                $("#TB_window").css({display:"block"});
              }
            }else{
              $("#TB_ajaxContent").load(url += "&random=" + (new Date().getTime()),function(){//to do a post change this load method
                tb_position();
                $("#TB_load").remove();
                tb_init("#TB_ajaxContent a.thickbox");
                $("#TB_window").css({display:"block"});
              });
            }
          
        }
        if(!params['modal']){
          document.onkeyup = function(e){   
            if (e == null) { // ie
              keycode = event.keyCode;
            } else { // mozilla
              keycode = e.which;
            }
            if(keycode == 27){ // close
              tb_remove();
            }  
          };
        }
        
      } catch(e) {
        //nothing here
      }
    }
    //helper functions below
    function tb_showIframe(){
      $("#TB_load").remove();
      $("#TB_window").css({display:"block"});
    }
    function tb_remove() {
       $("#TB_imageOff").unbind("click");
      $("#TB_closeWindowButton").unbind("click");
      $("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').trigger("unload").unbind().remove();});
      $("#TB_load").remove();
      if (typeof document.body.style.maxHeight == "undefined") {//if IE 6
        $("body","html").css({height: "auto", width: "auto"});
        $("html").css("overflow","");
      }
      document.onkeydown = "";
      document.onkeyup = "";
      return false;
    }
    function tb_position() {
    $("#TB_window").css({marginLeft: '-' + parseInt((TB_WIDTH / 2),10) + 'px', width: TB_WIDTH + 'px'});
      if ( !(jQuery.browser.msie && jQuery.browser.version < 7)) { // take away IE6
        $("#TB_window").css({marginTop: '-' + parseInt((TB_HEIGHT / 2),10) + 'px'});
      }
    }
    function tb_parseQuery ( query ) {
       var Params = {};
       if ( ! query ) {return Params;}// return empty object
       var Pairs = query.split(/[;&]/);
       for ( var i = 0; i < Pairs.length; i++ ) {
          var KeyVal = Pairs[i].split('=');
          if ( ! KeyVal || KeyVal.length != 2 ) {continue;}
          var key = unescape( KeyVal[0] );
          var val = unescape( KeyVal[1] );
          val = val.replace(/\+/g, ' ');
          Params[key] = val;
       }
       return Params;
    }
    function tb_getPageSize(){
      var de = document.documentElement;
      var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
      var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
      arrayPageSize = [w,h];
      return arrayPageSize;
    }
    function tb_detectMacXFF() {
      var userAgent = navigator.userAgent.toLowerCase();
      if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1) {
        return true;
      }
    }
    thank you for any and all help that you can give
    Last edited by eljhongo; 06-16-2009 at 01:40 AM. Reason: i write like a retard sometimes

  • #4
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    so i have tried a bunch of different things but all i can manage to do is break the damn thing... this is so frustrating...

  • #5
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    I apologize for bumping... but i have been going at this for a while now with no success. If anyone could help me out i would truly appreciate it.

  • #6
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    Solved

    Ok, I finally got it to work with the help of several people, here is what I ended up using in the header of my page:

    <script type='text/javascript'> jQuery(function(){ jQuery("containerID:eq(0)").trigger('click'); }); </script>

  • #7
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    Quote Originally Posted by eljhongo View Post
    I apologize for bumping... but i have been going at this for a while now with no success. If anyone could help me out i would truly appreciate it.
    I would be interested in figuring out a way to do this as well. Looking forward to seeing what gets posted.


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