// JavaScript Document

var lwr = 'abcdefghijklmnopqrstuvwxyz';
var upr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ-';

function isValid(parm,val) {
  if (parm == "") return false;
  for (i=0; i<parm.length; i++) {
    if (val.indexOf(parm.charAt(i),0) == -1) return false;
  }
  return true;
}


function isAlpha(parm) {
	return isValid(parm,lwr+upr);
}

function isFilled(field) {
	if (field.value.length < 1 || field.value == 0) {
   	return false;
	
  }	else {
	return true;
  }
}

function isOneFilled(field, otherField) {
	if (field.value.length > 0 || otherField.value.length > 0) {
   		return true;
	} else {
		return false;
	}
}


function isEmail(field) {
	if (field.value.indexOf("@") == -1 || field.value.indexOf(".") == -1)
	{
		return false;
		
	  } else {
	  	return true;
	  }
	} 


function validateForm (whichform) {
	for (var i=0; i<whichform.elements.length; i++) {
		var element = whichform.elements [i];
		if (element.className.indexOf("required") != -1) {
			if (!isFilled(element)) {
				alert("Please complete a "+element.title+" ");
				return false;
			} 
		}
		if (element.name == "delhousename" || element.name == "delhouseno") {
			
			var otherElementId = (element.name == "delhousename") ? "delhouseno" : "delhousename"
			var otherElement = document.getElementById(otherElementId);
			if (!isOneFilled(element, otherElement)) {
				alert("Please complete a house name or/and a house number");
				return false;
			} 
		}
		if (element.name == "mobile" || element.name == "telephone") {
			var otherElementId = (element.name == "mobile") ? "telephone" : "mobile"
			var otherElement = document.getElementById(otherElementId);
			if (!isOneFilled(element, otherElement)) {
				alert("Please complete a telephone or/and mobile number");
				return false;
			} 
		}
		if (element.className.indexOf("email") != -1) {
			if(!isEmail(element)) {
			   alert ("The "+element.name+" must be a valid ");
			   	return false;
				}
			}
		if (element.name =="shirtname") {
			
			if(!isAlpha(element.value)) {
			   alert ("The "+element.title+" must be letters and spaces only ");
			   	return false;
				}
			}
		}
		return true;
	}

function confirmDelete (article_id) {
	if (confirm("Are you sure you want to permanently delete this article ? ")){
		document.getElementById("article_id").value = article_id; 	
		document.delete_form.submit();
	
	}	
return false;

}


function confirmReviewDelete (rating_id) {
	if (confirm("Are you sure you want to permanently delete this review ? ")){
		document.getElementById("rating_id").value = rating_id; 	
		document.delete_form.submit();
	
	}	
return false;

}


function confirmBookDelete (book_id) {
	if (confirm("Are you sure you want to permanently remove this book from your website ? ")){
		document.getElementById("book_id").value = book_id; 	
		document.delete_form.submit();
	
	}	
return false;

}