function Pager(tableName, itemsPerPage) {
	
    this.tableName = tableName;
    this.itemsPerPage = itemsPerPage;
    this.currentPage = 1;
    this.pages = 0;
    this.inited = false;
    this.hover = "#ad0101";
    this.hoveroff = "";
    this.hiddenPageColor = '#b7c0c6';   //default colors of NON-selected pages
    this.selectedPageColor = '#004584'; //default colors of Selected pages
    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 pgSelected = this.getElementByClass('pg-selected');
       
       if(newPageAnchor.className == 'pg-selected'){
             oldPageAnchor.style.color=this.hiddenPageColor;
             newPageAnchor.style.color=this.selectedPageColor;
        }else{     
             oldPageAnchor.style.color=this.hiddenPageColor;
             newPageAnchor.style.color=this.hiddenPageColor;
        }
             
        if(this.pages == 1){        	
            pgSelected.style.display = 'none';
        }
        
        var pgNext = this.getElementByClass('pgNext');
        var pgPrev = this.getElementByClass('pgPrev');
        

        if (pageNumber == this.pages)
           pgNext.style.display = 'none';
        else
           pgNext.style.display = 'inline';
        
        if (pageNumber == 1)
           pgPrev.style.display = 'none';
        else
           pgPrev.style.display = 'inline';
    }   
    
    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.getElementByClass = function(myClass) {
   //Populate the array with all the page tags
    var allPagetags=document.getElementsByTagName("span");

     //Cycle through the tags using a for loop
    for (i=0; i<allPagetags.length; i++) {
       //Pick out the tags with our class name
       if (allPagetags[i].className==myClass) {
         //Manipulate this in whatever way you want
       
         return allPagetags[i];
              }
    }
} 	
    
    this.init = function() {
		if(document.getElementById(this.tableName)){
            var rows = document.getElementById(this.tableName).rows;
			var records = (rows.length - 1); 
            this.pages = Math.ceil(records / itemsPerPage);
            this.inited = true;
	    }else{
			 this.inited = false;
		}
        
    }

    this.showPageNav = function(pagerName, positionId) {
    	if (! this.inited) {
    		//alert("not inited");
    		return;
    	}
    	var element = document.getElementById(positionId);
    	
    	
    	var pagerHtml = '<span onmouseover="this.style.color=\''+this.hover+ '\';" onmouseout="this.style.color=\''+this.hiddenPageColor+ '\';" onclick="' + pagerName + '.prev();" class="pgPrev"> &#171 Prev  | </span>';
    	//alert(pagerHtml);
        for (var page = 1; page <= this.pages; page++){ 
        //	var newPage = document.getElementById('pg'+page);
         //   if(newPage.className == 'pg-selected'){
                pagerHtml += '<span style="color:'+this.hiddenPageColor+'" id="pg' + page + '"  onclick="' + pagerName + '.showPage(' + page + ');">' + page + '  | </span>';
           // }else{
            //	pagerHtml += '<span id="pg' + page + '" onmouseover="this.style.color=\''+this.hover+ '\';" onmouseout="this.style.color=\''+this.hiddenPageColor+ '\';" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '  | </span>';
           // }
        }
        pagerHtml += '<span  onmouseover="this.style.color=\''+this.hover+ '\';" onmouseout="this.style.color=\''+this.hiddenPageColor+ '\';" onclick="'+pagerName+'.next();" class="pgNext"> Next &#187;</span>';            
        
        element.innerHTML = pagerHtml;
    }
}