Need help with coding for generated link

[onetr1p]

This is my code:

/**
 * Class declaration
 */
function ZenpressPopup() {
};
 
 /**
  * Insert an image in the text editor
  * @param imageId	Id of the image (not used yet)
  * @param imageUrl	Filename of the image
  * @param imageName	Name (title) of the image
  */
ZenpressPopup.prototype.insertImage = function(imageId,imageUrl,imageName) {
	form = this.getEl('options');
	whatValue = this.getRadioValue(form.what);
	linkValue = this.getRadioValue(form.link);
	closeValue = this.getRadioValue(form.close);
	wrapValue = this.getRadioValue(form.wrap);
	sizeValue = this.getRadioValue(form.size);
	modRewrite = form.mod_rewrite.value;
	webPath = form.zp_web_path.value;
	albumUrl = form.album_url.value;
	albumName = form.album_name.value;
	customWidth = form.custom_width.value;
	customHeight = form.custom_height.value;
	
	imageHTML = "";
	
	if (linkValue!="none") {
		imageHTML += '<a href="';
		if (linkValue=="album") {
			if (modRewrite) {
				path = webPath+"/"+albumUrl;
			} else {
				path = webPath+"/index.php?album="+albumUrl;
			}
			imageHTML += path;
		} else if (linkValue=="custom" && form.link_custom_url.value!="") {
			imageHTML += form.link_custom_url.value;
		} else {	// "image" is the default
			if (modRewrite) {
				path = webPath+"/"+albumUrl+"/"+imageUrl
			} else {
				path = webPath+"/index.php?album="+albumUrl+"&amp;image="+imageUrl
			}
			imageHTML += path;
		}
		imageHTML += '">';
	}
	if (whatValue=="title") {
		imageHTML += imageName;
	} else if (whatValue=="custom" && form.what_custom_text.value!="") {
		imageHTML += form.what_custom_text.value;
	} else if (whatValue=="album") {
		imageHTML += albumName;
	} else {	// "thumb" is the default
		if (modRewrite && sizeValue!="custom") {
			// ZenPhoto's mod_rewrite does not support custom size!
			path = webPath+"/"+albumUrl+"/image/";
			if (sizeValue!="full") {
				path += "thumb/"
			}
			path += imageUrl
		} else {
			path = webPath+"/zen/i.php?a="+albumUrl+"&amp;i="+imageUrl;
			if (sizeValue!="full" && sizeValue!="custom") {
				path += "&amp;s=thumb";
			} else if (sizeValue=="custom") {
				path += "&amp;w="+customWidth+"&amp;h="+customHeight;
			}
		}
		imageStyle = '';
		imageClass = 'ZenPress_thumb ';
		
		if (wrapValue!="none") {
			imageStyle += 'float:'+wrapValue+'; ';
			imageClass += 'ZenPress_'+wrapValue+' ';
		}
		styleAttr = '';
		if (imageStyle!='') {
			styleAttr = 'style="'+imageStyle+'"';
		}
		imageHTML += '<img class="'+imageClass+'" alt="'+imageName+'" title="'+imageName+'" src="'+path+'" '+styleAttr+' />';
	}
	if (linkValue!="none") {
		imageHTML += '</a>';
	}

	if(window.tinyMCE) {
		window.opener.tinyMCE.execCommand("mceInsertContent",true,imageHTML);
	} else {
		this.insertAtCursor(window.opener.document.forms["post"].elements["content"],imageHTML);
	}
	
	if (closeValue!="false") {
		window.close();
	}
}

The link that is generated looks like this:

<a href="http://www.domain.com/albums/cars/ferrari.jpg">

How can I add rel="lightbox" to the coding?

I tried:

path = webPath+"/albums/"+albumUrl+"/"+imageUrl+" rel="lightbox"

but I get this generated:

<a href="http://www.domain.com/albums/cars/ferrari.jpg%20rel="lightbox.jpg"">

but I need it to have the space for it to work.
so it would look like

<a href="http://www.domain.com/albums/cars/ferrari.jpg" rel="lightbox">

How can I do this? Sorry I have no knowledge of programming at all. Thanks in advanced.

[Ize]

Change this line:

ZenpressPopup.prototype.insertImage = function(imageId,imageUrl,imageName) {
	form = this.getEl('options');
	whatValue = this.getRadioValue(form.what);
	linkValue = this.getRadioValue(form.link);
	closeValue = this.getRadioValue(form.close);
	wrapValue = this.getRadioValue(form.wrap);
	sizeValue = this.getRadioValue(form.size);
	modRewrite = form.mod_rewrite.value;
	webPath = form.zp_web_path.value;
	albumUrl = form.album_url.value;
	albumName = form.album_name.value;
	customWidth = form.custom_width.value;
	customHeight = form.custom_height.value;
	
	imageHTML = "";
	
	if (linkValue!="none") {
		imageHTML += '<a rel="lightbox" href="';