//desplegar texto

function cambiar(esto)
{
	vista=document.getElementById(esto).style.display;
	if (vista=='none')
		vista='block';
	else
		vista='none';

	document.getElementById(esto).style.display = vista;
}


//comprobar fotos formulario

function extension(){
						var i=1;
						while(i<6){
							var arch = document.getElementById("adj"+i).value;
							var num = arch.length;
							var x = arch.lastIndexOf('.');
							var ext = arch.substring(x,num);
							//alert(ext);
							if((ext!='.jpg')&&(ext!='.gif')&&(ext!= '.bmp')&&(ext!='')){
								document.getElementById("adj"+i).value = ''
								alert("Las extensiones validas son JPG, BMP, GIF ")
							}
						i++;
						}
					}
					
					function comprobarEmail(){
						var comp = document.getElementById("email").value;
						var arro = comp.indexOf('@');
						var punt = comp.indexOf('.');
						if((arro<2)||(punt<2)){
							document.getElementById("email").value = '';
							alert("Introduce un correo valido")
						}
					}
					
// validar formulario
					
function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' campo requerido.\n'; }
    } if (errors) alert('Han ocurrido los siguientes errores:\n'+errors);
    document.MM_returnValue = (errors == '');
} }