function lTrim(cadena){
	for(i=0; i<cadena.length; )
	{
		if(cadena.charAt(i)==" ")
			cadena=cadena.substring(i+1, cadena.length);
		else
			break;
	}
	return cadena;
}


function chr(c) {
	return String.fromCharCode(c);
}

function valrut(nRut, dv){
	dve = "";
	while((8-nRut.length)>0){nRut="0"+nRut}

	digo  = 0;
	digo += nRut.charAt(0)*3;
	digo += nRut.charAt(1)*2;
	digo += nRut.charAt(2)*7;
	digo += nRut.charAt(3)*6;
	digo += nRut.charAt(4)*5;
	digo += nRut.charAt(5)*4;
	digo += nRut.charAt(6)*3;
	digo += nRut.charAt(7)*2;

	resto=11 - mod(digo,11);

	if(resto==10){
		dve="K";
	}else{
		dve=resto.toString();
	}

	if(resto==11){
		dve="0";
	}


	if(dve==dv){
		return true;
	}else{
		return false;
	}
}

function mod(a , b){
	return Math.round(((a/b)-Math.floor(a/b))*b)
}

function valNum(e, float, valor) {
	tecla = (document.all)?e.keyCode:e.which;
	if (tecla==13||tecla==8||tecla==0) return true;
	if(float){
		patron = /^(?:\+|-)?\d+(\.)?\d*$/;
		return patron.test(valor+String.fromCharCode(tecla));
	}
	patron = /^(\d)*$/;
	return patron.test(String.fromCharCode(tecla));
}

function valDV(e) {
	tecla = (document.all)?e.keyCode:e.which;
	if (tecla==8||tecla==0) return true;
	patron = /[\dKk]/;
	return patron.test(String.fromCharCode(tecla));
}


function emailCheck (emailStr) {
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)
	//yo
	if (emailStr==''){
		//1return "No ha escrito la direccion de E-Mail";
		return false;
	}
	//fin yo
	if (matchArray==null){
		//return "Dirección Email está incorrecta Por favor verifique @ y .";
		return false;
	}
	var user=matchArray[1]
	var domain=matchArray[2]

	if (user.match(userPat)==null) {
		//return "Username no valido.";
		return false;
	}

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				//return "Dirección IP no Valida!";
				return false;
			}
		}
		return true;
	}
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		//return "El dominio indicado no existe.";
		return false;
	}

	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>4) {
		//return "La dirección debe finalizar con un dominio valido.";
		return false;
	}
	if (len<2) {
		//return "Dirección incorrecta";
		return false;
	}
	return true;
}


function msg(strMsg,obj){
	alert(strMsg);
	if(obj) obj.focus();
	return false;
}