$(document).ready(function(){
    
    var $currIphone = $("#phoneStart");
	var $currtxt = $("#txtStart");
	var $counter = 0;
	
    $("#next").click(function () {
       
	   if($counter < 1 ){
		   
	   	   $counter = $counter + 1;
		   if($counter <= 1)
		   {
			  
			  $currtxt = $currtxt.next();
			  
			  $(".box").animate({width: 'hide'});
			  $currtxt.animate({width: 'show'});
			  if($counter == 1){
			  	$("#next").addClass('disable');
			  }
			  else if($counter > 0){
				$("#pre").removeClass('disable');	  
			  }
		   }
		   else{
			  $("#next").addClass('disable');
		   }
		   
	   }
    });
	
	
	$("#pre").click(function () {
      	if($counter > 0)
	  	{
			$counter = $counter - 1;	
			if($counter >= 0)
			{	
				$currtxt = $currtxt.prev();

				$(".box").animate({width: 'hide'});
				$currtxt.animate({width: 'show'});
				if($counter == 0){
			  	$("#pre").addClass('disable');
				}
				else if($counter > 0){
				$("#next").removeClass('disable');	  
				}
			}
		}
	  
    });
	

	

  });