var txtNext = 'Suivante';
var txtPrevious = 'Précédente';

function getElementsByName_iefix(tag, name) {
     
     var elem = document.getElementsByTagName(tag);
     var arr = new Array();
     for(i = 0,iarr = 0; i < elem.length; i++) {
          att = elem[i].getAttribute("name");
          if(att == name) {
               arr[iarr] = elem[i];
               iarr++;
          }
     }
     return arr;
}


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;
        
        var rows = getElementsByName_iefix("div", tableName);
        
      /// var rowsdiv = document.getElementById("ListPositions");
       // var rows = rowsdiv.getElementsByTagName("div");
        
//        var rows = document.getElementsByName(tableName);
        // i starts from 1 to skip table header row
      //  alert('1');
        for (var i = 0; i < rows.length; i++) {
        //alert('2');
            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';
        //alert(document.getElementById('pg'+this.currentPage));
        
        this.currentPage = pageNumber;
        var newPageAnchor = document.getElementById('pg'+this.currentPage);
        newPageAnchor.className = 'pg-selected';
        
        var from = (pageNumber - 1) * itemsPerPage ;
        var to = from + itemsPerPage - 1;
        this.showRecords(from, to);
    }   
    
    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.getElementsByTagName(tableName);
    
     //   var rowsdiv = document.getElementById("ListPositions");
     //   var rows = rowsdiv.getElementsByTagName("div");
        
       var rows = getElementsByName_iefix("div", tableName);
        
      //  alert(tableName);
      //  alert(rows.length);                      
        
        //document.getElementById('mydiv').getElementsByTagName('span')[0].style.display="inline";
        
        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);
    	
//    	if ((document.getElementsByName(tableName)).length <= itemsPerPage) 
//    	{ 
//          	//element.style.visibility = "collapse"; 
//          	//element.style.height = "1";
//    	}
        
    	//alert(this.pages);
    	var pagerHtml = '<span onclick="' + pagerName + '.prev();" class="pg-normal"> &#171'+txtPrevious +'</span> | ';
        for (var page = 1; page <= this.pages; page++) 
            pagerHtml += '<span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> | ';
        pagerHtml += '<span onclick="'+pagerName+'.next();" class="pg-normal"> '+txtNext+'&#187;</span>';            
        
        element.innerHTML = pagerHtml;
    }
  
}