function esnumero(cadena,form)
{
 var i=0, j=0,digits = '1234567890';

 for (i=0; i < cadena.length ; i ++ )
 {
  is_digit=0;
  for (j=0; j < digits.length; j++)
  {
   if (cadena.charAt(i) == digits.charAt(j))   is_digit=1;
  }
   if (!is_digit)
   {
    
     return(1);
   }

 }
 return(0);
}


function Comprueba(form) {

var t;
var recuento=0;

if (form.soporte.value=="-") {form.camp0.value=1;} else {form.camp0.value=0;}
form.camp1.value = esnumero(form.alto.value,form);
if (form.alto.value=="" || form.alto.value>50) {form.camp1.value=1;}
form.camp2.value = esnumero(form.ancho.value,form);
if (form.ancho.value=="" || form.ancho.value>30) {form.camp2.value=1;}
form.camp3.value = esnumero(form.caras.value,form);
if (form.caras.value=="-") {form.camp3.value=1;}
form.camp4.value = esnumero(form.unidades.value,form);
if (form.unidades.value=="") {form.camp4.value=1;}
if (form.color1.value=="") {form.camp5.value=1;form.camp5a.value=1;}
if (!form.tintaselect[1].disabled && form.color2.value=="") {form.camp5.value=1;form.camp5b.value=1;}
if (!form.tintaselect[2].disabled && form.color3.value=="") {form.camp5.value=1;form.camp5c.value=1;}
if (!form.tintaselect[3].disabled && form.color4.value=="") {form.camp5.value=1;form.camp5d.value=1;}
if (!form.tintaselect[4].disabled && form.color5.value=="") {form.camp5.value=1;form.camp5e.value=1;}
if (!form.tintaselect[5].disabled && form.color6.value=="") {form.camp5.value=1;form.camp5f.value=1;}
if (form.soporte_color.value=="-") {form.camp6.value=1;} else {form.camp6.value=0;}
for (t=0;t<6;t++) {
objeto="form.camp"+t+".value";
pedrito=eval(objeto);
recuento=recuento+pedrito;
}
if (recuento=="0000000")
{
form.submit();
}
else {
alert("Alguns dels camps son incorrectes. Si us plau, corretgeix els camps marcats en blau.");
form.action="pre_textil.php";
form.submit();

}

}