function esDigito(sChr){

	var sCod = sChr.charCodeAt(0);

	return ((sCod > 47) && (sCod < 58));

}



function valSep(oTxt){

	var bOk = false;

	bOk = bOk || ((oTxt.value.charAt(2) == "-") && (oTxt.value.charAt(5) == "-"));

	bOk = bOk || ((oTxt.value.charAt(2) == "/") && (oTxt.value.charAt(5) == "/"));

	return bOk;

}



function finMes(oTxt){

	var nMes = parseInt(oTxt.value.substr(3, 2), 10);

	var nRes = 0;

	switch (nMes){

	case 1: nRes = 31; break;

	case 2: nRes = 29; break;

	case 3: nRes = 31; break;

	case 4: nRes = 30; break;

	case 5: nRes = 31; break;

	case 6: nRes = 30; break;

	case 7: nRes = 31; break;

	case 8: nRes = 31; break;

	case 9: nRes = 30; break;

	case 10: nRes = 31; break;

	case 11: nRes = 30; break;

	case 12: nRes = 31; break;

	}

	return nRes;

}



function valDia(oTxt){

	var bOk = false;

	var nDia = parseInt(oTxt.value.substr(0, 2), 10);

	bOk = bOk || ((nDia >= 1) && (nDia <= finMes(oTxt)));

	return bOk;

}



function valMes(oTxt){

	var bOk = false;

	var nMes = parseInt(oTxt.value.substr(3, 2), 10);

	bOk = bOk || ((nMes >= 1) && (nMes <= 12));

	return bOk;

}



function valAno(oTxt){

	var bOk = true;

	var nAno = oTxt.value.substr(6);

	bOk = bOk && ((nAno.length == 2) || (nAno.length == 4));

	if (bOk){

		for (var i = 0; i < nAno.length; i++){

			bOk = bOk && esDigito(nAno.charAt(i));

		}

	}

	return bOk;

}



function valFecha(oTxt){

	var bOk = true;

	if (oTxt.value != ""){

		bOk = bOk && (valAno(oTxt));

		bOk = bOk && (valMes(oTxt));

		bOk = bOk && (valDia(oTxt));

		bOk = bOk && (valSep(oTxt));

			if (!bOk){

			alert("La Fecha es incorrecta");

			oTxt.select();

			}

	}

}

function validadia(field){

	dia1= field.value;

	if(dia1!=""){

		if(dia1>=1 && dia1<=31){

		}else{

			alert("El día es incorrecto verifique");

			field.select();

		}

	}

}

function validames(field){

	mes1= field.value;

	if(mes1!=""){

		if(mes1>=1 && mes1<=12){

		}else{

			alert("El mes es incorrecto verifique");

			field.select();

		}

	}

}

function validaano(field){

	ano1= field.value;

	if(ano1!=""){

		if(ano1.length==4){

		}else{

			alert("El año es incorrecto verifique");

			field.select();

		}

	}

}

function validadni(field){

	dni1= field.value;

	if(dni1==""){

	}else{

		if(dni1.length==8){

		}else{

			alert("El DNI debe contener 8 dígitos");

			field.select();

		}	

	}

}

function validaano1(field){

	ano2= field.value;

	if(ano2==""){

	}else{

	today = new Date();

	year1  = today.getYear();

	year1=year1+1;

		if(ano2.length==4){

			if(ano2>=1960 && ano2<=year1){

			}else{

				alert("El año debe debe de ser de 1960 a "+year1+"");		

				field.select();

			}

		}else{

			alert("El año debe de tener 4 dígitos");

			field.select();

		}

	}



}



/*----------valida placa----------*/

function valPlaca(txt)

{       e=event	

			tecla = (document.all) ? e.keyCode : e.which;

			if ((tecla < 48 || tecla > 57) && (tecla < 65 || tecla > 122) && (tecla!=45))

			{return false}

			if (tecla >= 91 && tecla <= 96){return false}

			cade=txt.value;

			valor=cade.toUpperCase();

			valor=valor.replace("Ñ","N");

			valor=valor.replace("Á","A");

			valor=valor.replace("É","E");

			valor=valor.replace("Í","I");

			valor=valor.replace("Ó","O");												

			valor=valor.replace("Ú","U");

			txt.value=valor

	}

/*---------------*/



<!---Solo formato2--->

//10/02/2007

	function valFecha2(e,txt) {

        pos=posicionCursor(txt)

		tecla = (document.all) ? e.keyCode : e.which;

		if(pos==2)

		{	if (tecla!=47) return false}

		else if(pos==5)

		{	if (tecla!=47) return false}



		else

		{	if (tecla<48 || tecla>57) return false	

		}

    }

<!----->	



<!---Devuelve la posicion del cursor en una caja de texto--->

function posicionCursor(elemento)

{

       var tb = document.getElementById(elemento)

        var cursor = -1;

        

        // IE

        if (document.selection && (document.selection != 'undefined'))

        {

            var _range = document.selection.createRange();

            var contador = 0;

            while (_range.move('character', -1))

                contador++;

            cursor = contador;

        }

       // FF

        else if (tb.selectionStart >= 0)

            cursor = tb.selectionStart;

    

       return cursor;

}

<!----->	



<!---Envia al hacer enter---->

function enter(e){

var keycode;

if (window.event) keycode = window.event.keyCode;

else if (e) keycode = e.which;

else return true;

if (keycode == 13){

envia();

return false;

}

else

return true;

}

<!------>



<!---Solo telefonos--->

	function fNumeros(e,txt) {

        tecla = (document.all) ? e.keyCode : e.which;

        if ((tecla<48 || tecla>57) && tecla!=42 && tecla!=35) return false;

    }

<!----->



<!---funcion TRIM-->

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;

}

<!----->



<!---deshabilita campos--->

function deshabilita(cc,frm)

{	form1=document.getElementById(frm)

	i=form1.length - cc;

	for(j=0;j<i;j++)

	{	form1[j].disabled=true;}

}

<!----->

<!---Quita mayusculas acentos y enes--->

/*	function formato3(txt)

	{		cade=document.getElementById(txt).value

			posi=posicionCursor(txt)

			valor=cade.toUpperCase();

			valor=valor.replace("Ñ","N")

			valor=valor.replace("Á","A")

			valor=valor.replace("É","E")

			valor=valor.replace("Í","I")

			valor=valor.replace("Ó","O")												

			valor=valor.replace("Ú","U")

			document.getElementById(txt).value=valor

			if ((event.shiftKey!=1))

			{ponCursorEnPos(posi,txt)}

	}*/

	function formato3(txt)

	{		cade=document.getElementById(txt).value

			//posi=posicionCursor(txt)

			valor=cade.toUpperCase();

			valor=valor.replace("Ñ","N")

			valor=valor.replace("Á","A")

			valor=valor.replace("É","E")

			valor=valor.replace("Í","I")

			valor=valor.replace("Ó","O")												

			valor=valor.replace("Ú","U")

			document.getElementById(txt).value=valor

			/*if ((event.shiftKey!=1))

			{ponCursorEnPos(posi,txt)}*/

	}



<!----->



<!---Quita minusculas acentos y enes--->

	function formato4(txt)

	{       cade=document.getElementById(txt).value

			valor=cade.toLowerCase();

			valor=valor.replace("ñ","n")

			valor=valor.replace("á","a")

			valor=valor.replace("é","e")

			valor=valor.replace("í","i")

			valor=valor.replace("ó","o")												

			valor=valor.replace("ú","u")

			document.getElementById(txt).value=valor

	}

<!----->



<!---pone cursor en posicion pos--->

function ponCursorEnPos(pos,caja){ 

	laCaja=document.getElementById(caja)

	if(typeof document.selection != 'undefined' && document.selection){ 

		var tex=laCaja.value;

        document.getElementById(caja).value=''; 

       // forzar_focus();

        var str = document.selection.createRange(); 

        document.getElementById(caja).value=tex;

        str.move("character", pos); 

        str.moveEnd("character", 0); 

        str.select();

    }

    else if(typeof laCaja.selectionStart != 'undefined'){ 

        laCaja.setSelectionRange(pos,pos);//forzar_focus();

    }



} 

<!----->	

<!---Solo decimales--->

	function decimales(e,txt) {

        tecla = (document.all) ? e.keyCode : e.which;

        if ((tecla<48 || tecla>57) && tecla!=46) return false

        if (tecla == 46 && txt.indexOf('.')!=-1) return false;

    }

<!----->



<!---Solo numeros--->

	var nav4 = window.Event ? true : false;

	function acceptNum(evt){ 

	// NOTE: Backspace = 8, Enter = 13, '0' = 48, '9' = 57 	

	var key = nav4 ? evt.which : evt.keyCode; 

	return (key <= 13 || (key >= 48 && key <= 57));

	}

	

	<!----->

	function conMayusculas(field) { 

            field.value = field.value.toUpperCase() 

	}

	function conMinusculas(field) { 

            field.value = field.value.toLowerCase() 

	}