// General functions for validating forms

var OPERA	= (/Opera/i.test(window.navigator.userAgent));
var IE		= (/MSIE/i.test(window.navigator.userAgent) && !OPERA);
var IE6		= (/MSIE 6/i.test(window.navigator.userAgent) && !OPERA);
var IE7		= (/MSIE 7/i.test(window.navigator.userAgent) && !OPERA);
var MOZ		= (/(Firefox|gecko)/i.test(window.navigator.userAgent));
var mouseX	= 0;
var mouseY	= 0;

// Ajax function

// Creación del objeto XMLHttpRequest
function newAjax(){
	var req = false;
	// para navegadores como la gente
	if(window.XMLHttpRequest) {
		try {
			req = new XMLHttpRequest();
		} catch(e) {
			req = false;
		}//fin try
	// para IE
	} else if(window.ActiveXObject) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
			return req;
		} catch(e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				req = false;
			}//fin try2
		}//fin try 1
	}//fin del if
	return req;
}//fin de la funcion newAjax()


function check_fecha(caja){
   if (caja){
   	      borrar = caja;
      if ((caja.substr(4,1) == "-") && (caja.substr(7,1) == "-")){
	        a = caja.substr(0,4);
		    m = caja.substr(5,2);
		    d = caja.substr(8,2);
		    if((a < 1900) || (a > 2050) || (m < 1) || (m > 12) || (d < 1) || (d > 31))
		       return false;
		    else{
		       if((a%4 != 0) && (m == 2) && (d > 28))
		         return false;
			   else{
		          if ((((m == 4) || (m == 6) || (m == 9) || (m==11)) && (d>30)) || ((m==2) && (d>29)))
			      	return false;
			      else{
					return true;
			      }
			   }
		    }
      }else
	     return false;
   }
}

function encode(v)
{
	return escape(v).replace(/\+/ig, '%2B').replace(/\//ig, '%2F');
}


//By Demipedia
function trim(v)
{
	return v.replace(/^\s+/i, '').replace(/\s+$/i, '');
}