var Paging = function(parameters){

	var _page_per_view = 2.0;
	var _rows_per_page = 15;
	var _current_page=1; 
	var _record_count = 0;
	var _goto_page= 'gotoPage';
	var _render_top = null;
	var _render_bottom = null;
    var _lang = '';
    var _cond = '';
    var _rand = 0;
	
	//constructor function
	var _Paging = function(parameters){
		
		if (parameters.page_per_view !=null){
			_page_per_view = parameters.page_per_view;
		}
		
		if (parameters.rows_per_page !=null){
			_rows_per_page = parameters.rows_per_page;
		}
		
		if (parameters.render_top != null){
			_render_top = parameters.render_top;
		}
		
		if (parameters.render_bottom != null){
			_render_bottom = parameters.render_bottom;
		}
		
		if (parameters.record_count > 0){
			_record_count = parameters.record_count; 
		}
		
		if (parameters.current_page){
			_current_page = parameters.current_page; 
		}
		
		if (parameters.on_success){
			_goto_page = parameters.on_success; 
		}
        
        if (parameters.lang){
            _lang = parameters.lang; 
        }
        
        if (parameters.cond){
            _cond = parameters.cond; 
        }
        
        if (parameters.rand){
            _rand = parameters.rand; 
        }
	}
	
	this.getCurrentPage  = function(){ return _current_page; }
	this.setCurrentPage = function(current_page){ _current_page = current_page };
	
	this.getRecordCount  = function(){ return _record_count; }
	this.setRecordCount = function(record_count){ _record_count = record_count };

	this.getRowsPerPage  = function(){ return _rows_per_page; }
	this.setRowsPerPage = function(rows_per_page){ _rows_per_page = rows_per_page };
	
	this.getGotoPage = function(){ return _goto_page; }
	this.setGotoPage = function(goto_page){ _goto_page = goto_page };
	
	this.getRowStart = function(){ 
		return (_current_page * _rows_per_page) - _rows_per_page + 1;
	}
	
	this.getRowEnd = function(){
		return _current_page * _rows_per_page;
	}
	
	this.getNextPage = function(){ 
		return _current_page  + 1;
	}
	
	this.getPreviousPage = function(){ 
		return _current_page  - 1;
	}

	this.getTotalPages = function(){
		
		//var result = (_record_count / _rows_per_page) +  (_record_count % _rows_per_page == 0? 0: 1); 
		var result = _record_count / _page_per_view;
		result = Math.ceil(result); 
		//result = parseInt(result,10);	//disregard the decimal points

		return result;
	}
	
	this.getCountStart = function(){ 
		
		var page_no = _current_page;
		
		page_no = parseFloat(page_no); 
		
		page_no = Math.ceil( (page_no / (_page_per_view)))  -1 ;
		
		page_no = (page_no * _page_per_view) + 1;
		
		return page_no ;
		
		//return Math.ceil( (page_no / (_page_per_view))) ;
		
		//return  (((_current_page - 1 )/ _page_per_view) * _page_per_view) + 1 ;
	}
	
	this.getCountEnd = function(){ 
		
		var count_end = this.getCountStart() + _page_per_view;
		
		if(count_end > this.getTotalPages()){
			count_end = Number(this.getTotalPages()) + 1;
		}
		return count_end;
	}
	//Output: [<< < Page 1 2 3 4 5 6 7 8 9 10 11 > >>]			
	this.getPagingStyle2 = function(){
		
		var goto_page = this.getGotoPage();
		var current_page = this.getCurrentPage();
		
		var count_start = 1;
		var count_end = this.getTotalPages();
		
		var previous_page = Number(this.getCurrentPage()) - 1;
		var next_page = Number(this.getCurrentPage()) + 1 ; 
		
		var first_page = 1;
		var last_page = this.getTotalPages(); 
		
		var paging ='';
		var link_page='';
		var link_first_page='';
		var link_prev_page='';
		var link_last_page ='';
		var link_next_page=''
		
		var link_param_others = '"' + this.getRecordCount()  + '","' + goto_page + '","' + 
								_render_top + '","' + _render_bottom + '"';
		var params = 'render_top:"' + _render_top + '",' +
					    'render_bottom:"' + _render_bottom + '",' +
					    'goto_page:"' + goto_page + '",' +
                        'page_per_view:"' + _page_per_view + '",' +
					    'record_count:"' + this.getRecordCount()  + '",' +
                        'lang:"' + _lang  + '",' +
                        'cond:"' + _cond  + '",' +
                        'rand:"' + _rand + '"' ;
								
        for (var i=count_start; i<=count_end;i++){			
            if (i == current_page){
				paging  = paging + ' <span class="pageOff">' + i + '</span>';
			}else{											
				link_page = 'javascript:' + goto_page + '({on_success:"' + i + '",'+ params +  '})';
				paging  = paging + " <a class='pageOn' href='" + link_page + "'>" + i + "</a>";
			}
		}
        
		if (current_page>1){			
			link_page = 'javascript:' + goto_page + '({on_success:"' + previous_page + '",' + params +  '})';
			link_prev_page = "<a href='" + link_page + "'><img border='0' src='images/previousPage_" + _lang + ".gif'></a>";					
		}
        else
        {
            link_prev_page = "<img border='0' src='images/previousPage_" + _lang + "_off.gif'>";           
        }
		
		if (current_page != last_page){			
			link_page = 'javascript:' + goto_page + '({on_success:"' + next_page + '",' + params +  '})';			
			link_next_page = "<a href='" + link_page + "'><img border='0' src='images/nextPage_" + _lang + ".gif'></a>";

		}
        else
        {
            link_next_page = "<img border='0' src='images/nextPage_" + _lang + "_off.gif'>";
        }
		
		paging = '<table width="100%"><tr><td width="1" align="left">' + link_prev_page + '</td><td align="center">' + paging + '</td><td align="right" width="1">' + link_next_page + '</td></tr></table>';
		
		//render the paging (at the top)
		if (_render_top !=null){
			document.getElementById(_render_top).innerHTML = paging;
		}

		//render the paging (at the bottom)
		//if (_render_bottom !="null"){
		var bottom_page_exist = document.getElementById(_render_bottom);
		if (bottom_page_exist){	
			//alert(_render_bottom);
			document.getElementById(_render_bottom).innerHTML = paging;

		}else{
			//alert(document.getElementById(_render_bottom) );			
		}
	}
		
	//call the constructor
	_Paging(parameters);

	if (_record_count>0){
		this.getPagingStyle2();
	}else{

		if (_render_top){
			document.getElementById(_render_top).innerHTML = 'NO DATA AVAILABLE';
		}
		
		//render the paging (at the bottom)
		if (_render_bottom){
			document.getElementById(_render_bottom).innerHTML ='NO DATA AVAILABLE';
		}
	}
	
}