function Pager(tableName, itemsPerPage, totalPages) {
    this.tableName = tableName;
    this.itemsPerPage = itemsPerPage;
    this.currentPage = 1;
    this.pages = 0;
    this.inited = false;
    this.totalPages = totalPages;
    
    this.showRecords = function(from, to) {        
        var rows = document.getElementById(tableName).rows;
        // i starts from 1 to skip table header row
        
        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);
        
        var pgNext = document.getElementById('pgNext');
        var pgPrev = document.getElementById('pgPrev');
        if (this.currentPage == this.pages)
            pgNext.style.display = 'none';
        else
            pgNext.style.display = '';
	if (this.currentPage == 1)
            pgPrev.style.display = 'none';
        else
            pgPrev.style.display = '';
    }

    
    /*added by paul mangaser displaying of records*/
	this.showFromTo = function(from){
		
		var halfPages = this.totalPages % itemsPerPage;
		var lucy = itemsPerPage - halfPages
		
			if (this.currentPage == this.pages){
				//var to = (from + itemsPerPage - 1) - this.pages;
				var to = (this.currentPage * itemsPerPage) - lucy;
				//var to = this.totalPages;
			}else{
				var to = from + itemsPerPage - 1;
			}
			
		var paul = from + ' - ' + to;	
		document.getElementById('yael').innerHTML = paul;
		//alert(paul);
	}
	/*end of displaying of records*/
	
    this.prev = function() {
        if (this.currentPage > 1)
            this.showPage(this.currentPage - 1);
    }
    
    this.next = function() {
    
        if (this.currentPage < this.pages) {
            this.showPage(this.currentPage + 1);
        }
    }     
                      
    
    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 pagerHtml = '<span  id="pgPrev" onclick="' + pagerName + '.prev();" class="pg-normal" ><img src="images/prev.png" alt="" width="86" height="24" border="0" /></span>';
        for (var page = 1; page <= this.pages; page++) 
        	pagerHtml += ' <span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');"></span> ';
        pagerHtml += '<span id="pgNext" onclick="'+pagerName+'.next();" class="pg-normal" ><img src="images/next.png" alt="" width="86" height="24" border="0" /></span>'; 
        
        element.innerHTML = pagerHtml;
    }
    
   
   
}