//Funciones generales
function isMail(_email) 
{
	var emailReg = /^[a-z][a-z-_0-9\.]+@[a-z-_=>0-9\.]+\.[a-z]{2,3}$/i
	return emailReg.test(_email);
}


function lTrim (myString) {
		
	var finish = myString.length;	
	var start = 0;
	
    while ((myString.charAt(start) == " ") && (start <= finish -1)) {
         start ++;
	}

	myString = myString.substring (start, finish);

	return myString;
}

function rTrim (myString) {		

	var finish = myString.length - 1;

    while ((myString.charAt(finish) == " ") && (finish >= 0)) {
          finish --;
	}

	myString = myString.substring (0, finish + 1);

	return myString;
}

function trim (myString) {
	
    myString = lTrim(myString);
	myString = rTrim(myString);

	return myString;
}