// -------------------------------------------------------------------
// Ryan Beal Modified 01-16-09: Fix Bug to Allow Ads to Load
// Photo Album Script v2.0- By Dynamic Drive, available at: http://www.dynamicdrive.com
// Mar 11th, 07': Script updated to v2.0
// -------------------------------------------------------------------

function photogallery(garray, cols, rows, twidth, theight, paginatetext){
	gcount=(typeof gcount=="undefined")? 1 : gcount+1 //global var to keep count of current instance of photo gallery
	this.gcount=gcount
	this.galleryarray=garray
	this.cols=cols
	this.rows=rows
	var twidth=twidth || "700x" //default table width is 700px
	var theight=theight || "500px"
	var ptext=(typeof paginatetext=="object")? paginatetext : ["Browse Gallery:", ""] //Store 2 compontents of paginate DIV text inside array
	this.pagecount=Math.ceil(this.galleryarray.length/(cols*rows)) //calculate number of "pages" needed to show the images
	
	document.write('<table class="photogallery" id="photogallery-'+gcount+'" style="width:'+twidth+'; height:'+theight+';">') //Generate table for Photo Gallery
	for (var r=0; r<rows; r++){
		document.write('<tr>')
		for (var c=0; c<cols; c++)
			document.write('<td valign="top"></td>')
		document.write('</tr>')
	}
	document.write('</table>')
	document.write('<div class="photonavlinks" id="photogallerypaginate-'+gcount+'"></div>') //Generate Paginate Div
    
    
	var gdiv=document.getElementById("photogallery-"+this.gcount)
	var pdiv=document.getElementById("photogallerypaginate-"+this.gcount)
	gdiv.onselectphoto=function(imgobj, linkobj){return true} //custom event handler "onselectphoto", invoked when user clicks on an image within gallery
	this.showpage(gdiv, 0)
	this.createNav(gdiv, pdiv, ptext)
	gdiv.onclick=function(e){return photogallery.defaultselectaction(e, this)} //attach default custom event handler action to "onclick" event
	return gdiv
    
}


photogallery.prototype.createImage=function(imgparts){
    var span = document.createElement('span');
    var img = document.createElement('img');
    var aTag = null;
    
    if(imgparts[0] != null) img.src = imgparts[0];
    if(imgparts[1] != null) img.title = imgparts[1];
    
	if (typeof imgparts[2] != "undefined" && imgparts[2] != ""){ //Create URL?
	    aTag = document.createElement("a");
	    aTag.href = imgparts[2];
	    aTag.appendChild(img);
	    span.appendChild(aTag);
	}
	else {
	    span.appendChild(img);
	}
	
	if (typeof imgparts[1] != "undefined" && imgparts[1] != "") {//Display description?
	    span.appendChild(document.createElement('br'));
	    span.appendChild(document.createTextNode(imgparts[1]));
	}
	
	return span;
}


photogallery.prototype.showpage=function(gdiv, pagenumber){
	var totalitems = this.galleryarray.length //total number of images
	var showstartindex = pagenumber * (this.rows * this.cols) //array index of div to start showing per pagenumber setting
	var showendindex = showstartindex + (this.rows * this.cols) //array index of div to stop showing after per pagenumber setting
	var tablecells = gdiv.getElementsByTagName("td")
	
	for (var i = showstartindex, currentcell = 0; i < showendindex && i < totalitems; i++, currentcell++) {//Loop thru this page's images and populate cells with them
        var tablecell = tablecells[currentcell];
        while(tablecell.hasChildNodes()) {
            tablecell.removeChild(tablecell.childNodes[0]);
        }
        
		tablecells[currentcell].appendChild(this.createImage(this.galleryarray[i]));
    }
	while (currentcell < tablecells.length) { //For unused cells, if any, clear out its contents
		tablecells[currentcell].innerHTML=""
		currentcell++;
	}
}

photogallery.prototype.createNav=function(gdiv, pdiv , ptext){
	var instanceOfGallery=this;
	
	pdiv.appendChild(document.createTextNode("Select a Gallery  "));
	
	var aTag = null;
	for (var i=0; i<this.pagecount; i++) {
	    aTag = document.createElement('a');
	    aTag.href="#navigate";
	    aTag.rel = i;
	    aTag.appendChild(document.createTextNode(ptext[1] + (i+1)));
	    pdiv.appendChild(aTag);
    }
	
	var navlinks=pdiv.getElementsByTagName("a")
	navlinks[0].className="current" //Select first link by default
	this.previouspage=navlinks[0] //Set previous clicked on link to current link for future ref
	for (var i=0; i<navlinks.length; i++){
		navlinks[i].onclick=function(){
			instanceOfGallery.previouspage.className="" //"Unhighlight" last link clicked on...
			this.className="current" //while "highlighting" currently clicked on flatview link (setting its class name to "selected"
			instanceOfGallery.showpage(gdiv, this.getAttribute("rel"))
			instanceOfGallery.previouspage=this //Set previous clicked on link to current link for future ref
			return false
		}
	}
}

photogallery.defaultselectaction=function(e, gdiv){ //function that runs user defined "onselectphoto()" event handler
	var evtobj=e || window.event
	var clickedobj=evtobj.target || evtobj.srcElement
	if (clickedobj.tagName=="IMG"){
		var linkobj=(clickedobj.parentNode.tagName=="A")? clickedobj.parentNode : null
		return gdiv.onselectphoto(clickedobj, linkobj)
	}
}