Update hidden field - jquery - php

Question

OK, going to try and explain this properly as I think thats why an answer is escaping me and some users are giving me negative replies as they think I have not tried with research to solve this problem.
I have a page where a user is presented with images within a slide viewer. Each item in the slide viewer is inside a LI element.
When a user chooses a slide, and the form is then submitted, I need the script to update a hidden field so I can take which slide they have chosen into a form. Either by updating onclick or when the form is submitted, it matters not when. The hidden field contains the URL of the image shown at that time.
So, the code I currently have is:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>
<script src="/js/jquery.easing.1.3.js" type="text/javascript"></script>
<!-- this is the slideviewer code -->
<script src="/js/jquery.slideviewer.1.2.js" type="text/javascript"></script>
<!-- this is what I have been trying to update the hidden field -->
<script type="text/javascript">
$(document).ready(function(){
$( "#wl_add" ).submit( function ( event ) { /* form name and id = wl_add */
$('input[name="item_pic_url"]').val($('#mygalthree img').attr('src'));
} );
});
</script>
<!-- the div containing the slide viewer -->
<div id="mygalthree" class="svw"><ul>
<?PHP
foreach($html->find('img') as $e){ // from simple_html_dom
$image = $e->src;
echo '<li><img src="'.$image.'" width=300 alt="" /></li>';
}
// the hidden field to be updated - i am presuming needs to be after the loop which feeds the LI elements
echo '<input type="hidden" name="item_pic_url" value="'.$image.'" />';
?>
</ul></div>
Or, would it be easier to update the hidden field each time a slide is chosen? below you can see the code for the slideviewer - I would have thought I might be able to add
$('input[name="item_pic_url"]').val($('#mygalthree img').attr('src'));
when the user clicks? But I cannot find where to add this either and I have tried nearly every line! Slideviewer code:
jQuery(function(){
jQuery("div.svw").prepend("<img src='/images/spinner.gif' class='ldrgif' alt='loading...'/ >");
});
var j = 0;
var quantofamo = 0;
jQuery.fn.slideView = function(settings) {
settings = jQuery.extend({
easeFunc: "easeInOutExpo",
easeTime: 750,
uiBefore: false,
toolTip: false,
ttOpacity: 0.9
}, settings);
return this.each(function(){
var container = jQuery(this);
container.find("img.ldrgif").remove();
container.removeClass("svw").addClass("stripViewer");
var pictWidth = container.find("img").width();
var pictHeight = container.find("img").height();
var pictEls = container.find("li").size();
var stripViewerWidth = pictWidth*pictEls;
container.find("ul").css("width" , stripViewerWidth);
container.css("width" , pictWidth);
container.css("height" , pictHeight);
container.each(function(i) {
(!settings.uiBefore) ? jQuery(this).after("<div class='stripTransmitter' id='stripTransmitter" + (j) + "'><ul><\/ul><\/div>") : jQuery(this).before("<div class='stripTransmitter' id='stripTransmitter" + (j) + "'><ul><\/ul><\/div>");
jQuery(this).find("li").each(function(n) {
jQuery("div#stripTransmitter" + j + " ul").append("<li><a title='" + jQuery(this).find("img").attr("alt") + "' href='#'>"+(n+1)+"<\/a><\/li>");
});
jQuery("div#stripTransmitter" + j + " a").each(function(z) {
jQuery(this).bind("click", function(){
jQuery(this).addClass("current").parent().parent().find("a").not(jQuery(this)).removeClass("current"); // wow!
var cnt = -(pictWidth*z);
container.find("ul").animate({ left: cnt}, settings.easeTime, settings.easeFunc);
return false;
});
});
container.bind("click", function(e){
var ui = (!settings.uiBefore) ? jQuery(this).next().find("a.current") : jQuery(this).prev().find("a.current");
var bTotal = parseFloat(jQuery(this).css('borderLeftWidth').replace("px", "")) + parseFloat(jQuery(this).css('borderRightWidth').replace("px", ""));
var dOs = jQuery(this).offset();
var zeroLeft = (bTotal/2 + pictWidth) - (e.pageX - dOs.left);
if(zeroLeft >= pictWidth/2) {
var uiprev = ui.parent().prev().find("a");
(jQuery(uiprev).length != 0)? uiprev.trigger("click") : ui.parent().parent().find("a:last").trigger("click");
}
else {
var uinext = ui.parent().next().find("a");
(jQuery(uinext).length != 0)? uinext.trigger("click") : ui.parent().parent().find("a:first").trigger("click");
}
});
jQuery("div#stripTransmitter" + j).css("width" , pictWidth);
jQuery("div#stripTransmitter" + j + " a:first").addClass("current");
jQuery('body').append('<div class="tooltip" style="display:none;"><\/div>');
if(settings.toolTip){
var aref = jQuery("div#stripTransmitter" + j + " a");
aref.live('mousemove', function(e) {
var att = jQuery(this).attr('title');
posX=e.pageX+10;
posY=e.pageY+10;
jQuery('.tooltip').html(att).css({'position': 'absolute', 'top': posY+'px', 'left': posX+'px', 'display': 'block', 'opacity': settings.ttOpacity});
});
aref.live('mouseout', function() {
jQuery('.tooltip').hide();
});
}
});
j++;
});
};

Answer 1

I suggest the same as Josh V.K. but without that ludicrous positioning hack.
<label>
<img src="imagelocation.jpg" />
<input type="radio" name="coolName" value="image_1" style="display: none;" />
</label>

Answer 2

OK, this has been driving me insane, but it is now solved... In the actual slideviewer code, when a user chooses a number of an image, I added a simple onclick to write the value of the hidden field.
jQuery("div#stripTransmitter" + j + " ul").append("<li><a title='" + jQuery(this).find("img").attr("alt") + "' href='#' onClick=\"document.wl_add.item_pic_url.value='" + jQuery(this).find("img").attr("src") + "'\" >"+(n+1)+"<\/a><\/li>");
Thanks for suggestions.

Answer 3

What I would do, rather than updating a hidden field, is assign each image as a label for a radio button. Then when you submit the form it will submit the value of that radio button. You will need to position the radio button left:-9999 or something so that the actual button doesn't show up.
<label>
<img src="imagelocation.jpg" />
<input type="radio" name="coolName" value="image_1" style="margin-left:-99999px;>
</label>
When the click on the image, it will select that radio button and that value will be submitted with the form.