function validar() {
    if (document.form1.name.value.length == 0){
     alert ("You must type a Name");
     document.form1.name.focus(); //Esto recorna el cursor al campo "Email"
     return false;	
    }
    if (document.form1.address.value.length == 0){
     alert ("You must type an address");
     document.form1.address.focus(); //Esto recorna el cursor al campo "Email"
     return false;	
    }
	  if (document.form1.email.value.indexOf('@') == -1){
     alert ("You must type a valid email");
     document.form1.email.focus(); //Esto recorna el cursor al campo "Email"
     return false;	
    }
	
    if (document.form1.telephone.value.length == 0){
     alert ("You must type a phone number");
     document.form1.telephone.focus(); //Esto recorna el cursor al campo "Email"
     return false;	
    }
    if (document.form1.call.value.length == 0){
     alert ("You must type a time to contact");
     document.form1.call.focus(); //Esto recorna el cursor al campo "Email"
     return false;	
    }
  
    return true;
   }