function changeNumUsers(num){
	if(num > 1){
		$('#text-num-usuarios').show();
		$('#num-usuarios').html('');
		var title = '';
		for(var x=1;x<num;x++){
			title = '<h3>Usuario '+(x+1)+'</h3>'; 
			$('#num-usuarios').append(title+jQuery('#data').html());
		}
		var total = 19*(Number(num))*3;
		total += (total*16)/100;
		$('#total-factura').html(total.toFixed(2));
		$('#campo-total-factura').val(total.toFixed(2));
	}else{
		var total = 19*3;
		total += (total*16)/100;
		$('#total-factura').html(total.toFixed(2));
		$('#campo-total-factura').val(total.toFixed(2));
		$('#text-num-usuarios').hide();
		$('#num-usuarios').html('');
	}
	
}

function loadAjaxSite(urlAjax){
   $.ajax({
        url: urlAjax,
        type: "GET",
        data: "vis=ajax",
        success: function(datos){
	        $('#contentAjax').html(datos);
	        $('#containerAjax').fadeIn();
	        $.scrollTo(0, 800);
	        var h = (window.innerHeight || document.documentElement.clientHeight || 0);
					
			$('#background').width($(document).width());
			$('#background').height($(document).height());
			$('#containerAjax').bind('click',function(e){e.stopPropagation();});
			$("#CONTAINER_PRESENTATION").bind("click", function(){
				closePresentation();		 
			});
			
						
	        $('#background').fadeIn();
              
      }
	});

}

	function closePresentation()
	{
		$('#background').hide();
		$('#background').css({'filter':'alpha(opacity=65)','-moz-opacity': '0.65','opacity': '0.65'});
		$('#containerAjax').hide();
	}

	//Simulacion de trim para javascript
	function trim(cadena)
	{
		 for(i=0; i<cadena.length; )
		 {
			 if(cadena.charAt(i)==" ")
			 	cadena=cadena.substring(i+1, cadena.length);
			 else
			 	break;
		 }
		
		 for(i=cadena.length-1; i>=0; i=cadena.length-1)
		 {
			 if(cadena.charAt(i)==" ")
			 	cadena=cadena.substring(0,i);
			 else
				 break;
		 }
		 return cadena;
	}
	
	function checkEmail(obj)
	{
		 email = obj;
		
		 var valid = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.@";
		 var ok = "yes";
		 var temp;
		 var arroba = 0;
		 var punto = 0;
		 for (var i=0; i<email.length; i++)
		 {
		 temp = "" + email.substring(i, i+1);
		 if (valid.indexOf(temp) == "-1") ok = "no";
		 if (temp == "@") arroba++;
		 if (temp == ".") punto++;
		 }
		 if ((ok == "no") || (arroba != 1) || (punto < 1))
		 {
		 	return false;
		 }
		 	return true;
	}