// JavaScript Document
function linkAlert(URL){
	}
	
function clearSearchField(objSearchInput) {
	if (objSearchInput.value == "Enter search terms") {
		objSearchInput.value = ""
	}
}

function checkSubmit(objForm) {
	if ((objForm.FreeText.value =="") || (objForm.FreeText.value == "Enter search terms")) {
		alert("Please enter a valid search query.");
		objForm.FreeText.focus();
		return false;
	}
	
	return true;
}

function checkFeedback(objForm) {
	if (objForm.feedbackPhone.value != ""){
		if (!checkPhone(objForm.feedbackPhone.value)) {
			alert("Please enter a valid telephone number (e.g. (02) 1234 5678).");
			objForm.feedbackPhone.focus();
			return false;
		}
	}
	
	if (objForm.email.value != "") {
		if (!checkEmail(objForm.email.value)) {
			alert("Please enter a valid email address (e.g. OzFoodNet@health.gov.au).");
			objForm.email.focus()
			return false;
		}
	}
	
	if (objForm.feedbackComments.value == "") {
		alert("Please enter your feedback comments.");
		objForm.feedbackComments.focus();
		return false;
	}
	
	return true;
}

function checkPhone(strPhone) {
	var objRE = /^\(?\+?\d+\)?\s?\d+\s?\d+$/

	if (objRE.test(strPhone)) {
		return true;
	}
	
	return false;
}

function checkEmail(strEmail) {
	var objRE = /^\w+([\.-]?\w+)*@\w+(-?\w+)*(\.\w{2,4})+$/
	
	if (objRE.test(strEmail)) {
		return true;
	}
	
	return false;
}
function hidehelp() {
	if (document.getElementById){
		var large = document.getElementById("large");
		var pdf = document.getElementById("pdf");
		if (large != null) {
		   large.style.display = "none";
		}
		if (pdf != null) {
			pdf.style.display = "none";
		}
	}
}

function showhelp(divname) {
	if (document.getElementById) {
		var divtoshow;
		divtoshow = document.getElementById(divname).style;
		if (divtoshow.display == 'none') {
        	divtoshow.display = 'block';
    	} else {
        	divtoshow.display = 'none';
  		}
	}
	return false;
}