function Pager(tableName, itemsPerPage) {
    this.tableName = tableName;
    this.itemsPerPage = itemsPerPage;
    this.currentPage = 1;
    this.pages = 0;
    this.inited = false;
    
    this.showRecords = function(from, to) {        
        var rows = document.getElementById(tableName).rows;
        for (var i = 1; i < rows.length; i++) {
            if (i < from || i > to)  
                rows[i].style.display = 'none';
            else
                rows[i].style.display = '';
        }
    }
    
    this.showPage = function(pageNumber) {
    	if (! this.inited) {
    		alert("not inited");
    		return;
    	}

//        var oldPageAnchor = document.getElementById('pg'+this.currentPage);
//        oldPageAnchor.className = 'pg-normal';
//        
        this.currentPage = pageNumber;
//        var newPageAnchor = document.getElementById('pg'+this.currentPage);
//        newPageAnchor.className = 'pg-selected';
        
        var from = (pageNumber - 1) * itemsPerPage + 1;
        var to = from + itemsPerPage - 1;
        this.showRecords(from, to);
    }   
    
    this.prev = function() {
        if (this.currentPage > 1)
            this.showPage(this.currentPage - 1);
			var textarea = document.getElementById('pageNav');
			var textareaTop = document.getElementById('pageNavTop');
			
			var textareahtml = '<p>Page '+this.currentPage+' of '+this.pages+'</p>';
			
			textarea.innerHTML = textareahtml;
			textareaTop.innerHTML = textareahtml;
    }
    
    this.next = function() {
        if (this.currentPage < this.pages) {
            this.showPage(this.currentPage + 1);
			var textarea = document.getElementById('pageNav');
			var textareaTop = document.getElementById('pageNavTop');
			
			var textareahtml = '<p>Page '+this.currentPage+' of '+this.pages+'</p>';
			
			textarea.innerHTML = textareahtml;	
			textareaTop.innerHTML = textareahtml;
        }
    }                        
    
    this.init = function() {
        var rows = document.getElementById(tableName).rows;
        var records = (rows.length - 1); 
        this.pages = Math.ceil(records / itemsPerPage);
        this.inited = true;
    }

    this.showPageNav = function(pagerName, positionId) {
    	if (! this.inited) {
    		alert("not inited");
    		return;
    	}
    	var element = document.getElementById(positionId);
		var elementTop = document.getElementById('pageNavPositionTop');
    	
    	var pagerHtml = '<a onclick="' + pagerName + '.prev();" href="#" class="pg-normal"> &#171 Prev </a> | ';
        //for (var page = 1; page <= this.pages; page++) 
            //pagerHtml += '<span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> | ';
        pagerHtml += '<a onclick="'+pagerName+'.next();" href="#" class="pg-normal"> Next &#187;</a>'; 
		pagerHtml += '<div id="pageNav"><p>Page '+this.currentPage+' of '+this.pages+'</p></div>';
		
		var pagerHtmlTop = '<a onclick="' + pagerName + '.prev();" href="#" class="pg-normal"> &#171 Prev </a> | ';
        //for (var page = 1; page <= this.pages; page++) 
            //pagerHtml += '<span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> | ';
        pagerHtmlTop += '<a onclick="'+pagerName+'.next();" href="#" class="pg-normal"> Next &#187;</a>'; 
		pagerHtmlTop += '<div id="pageNavTop"><p>Page '+this.currentPage+' of '+this.pages+'</p></div>';
        
        element.innerHTML = pagerHtml;
		elementTop.innerHTML = pagerHtmlTop;
    }
}