function goback() {
history.back()
}

function drawAlert() {
alert ("Sorry, this link is unavailabe at present!");
}

function printerFriendly(url, win) 
{
msgWindow=window.open(url,win,"toolbar=no,top=10,left=10,width=720,height=580,directories=no,status=no,resize=yes,scrollbars=yes,menubar=yes")
} 

function printpage() {
window.print()
}

function emailPage(url, win) 
{
msgWindow=window.open(url,win,"toolbar=no,top=10,left=10,width=640,height=580,directories=no,status=no,resize=yes,scrollbars=yes,menubar=yes")
} 

function submitSearch() {

missinginfo = "";

var keywordLength = (document.search.keywords.value);
var invalidWords = 0

if (keywordLength.length < 3 ) {
	missinginfo += "Your search term must have at least 3 characters";
}
if (document.search.keywords.value.indexOf('http') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('mailto') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('href') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('"') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('/') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('*') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf(':') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('<') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('>') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('|') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('?') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('_') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('@') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('www') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('index') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('\'') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf('(') !== -1) {
	invalidWords = 1
}
if (document.search.keywords.value.indexOf(')') !== -1) {
	invalidWords = 1
}

if (invalidWords !== 0)  {
	missinginfo = "Your search term contains an invalid character or word.";
}

if (missinginfo != "") {
	missinginfo = missinginfo + "\n" + "\nPlease re-enter and SEARCH again";
	alert(missinginfo);
}
else
	//alert("submit form");
	document.search.submit();
}

function replace(string,text,by) {
    // Replaces text with by in string
    var strLength = string.length, txtLength = text.length;
    if ((strLength == 0) || (txtLength == 0)) return string;

    var i = string.indexOf(text);
    if ((!i) && (text != string.substring(0,txtLength))) return string;
    if (i == -1) return string;

    var newstr = string.substring(0,i) + by;

    if (i+txtLength < strLength)
        newstr += replace(string.substring(i+txtLength,strLength),text,by);

    return newstr;
}

function replace2(string,text,by) {
    // Replaces text with by in string
    var strLength = string.length, txtLength = text.length;
    if ((strLength == 0) || (txtLength == 0)) return string;

    var i = string.indexOf(text);
    if ((!i) && (text != string.substring(0,txtLength))) return string;
    if (i == -1) return string;

    var newstr = string.substring(0,i) + by;

    if (i+txtLength < strLength)
        newstr += replace(string.substring(i+txtLength,strLength),text,by);

    return newstr;
}


if (document.images) {

// Preload Rollover "on" images
	img1on=new Image();
	img1on.src="images_gen/Btn-Occupational-Health-on.gif";
	img2on=new Image();
	img2on.src="images_gen/Btn-Vaccinations-on.gif";
	img3on=new Image();
	img3on.src="images_gen/Btn-Offshore-Medicals-on.gif";
	img4on=new Image();
	img4on.src="images_gen/Btn-Training-Support-on.gif";
	
	img7on=new Image();
	img7on.src="images_gen/Ark-OH-address-on.gif";
	img8on=new Image();
	img8on.src="images_gen/Ark-OH-email-on.gif";
	img9on=new Image();
	img9on.src="images_gen/maxandco-on.gif";

	img12on=new Image();
	img12on.src="images_gen/btn_search_on.gif";
	
// Preload Rollover "off" images
	img1off=new Image();
	img1off.src="images_gen/Btn-Occupational-Health-off.gif";
	img2off=new Image();
	img2off.src="images_gen/Btn-Vaccinations-off.gif";
	img3off=new Image();
	img3off.src="images_gen/Btn-Offshore-Medicals-off.gif";
	img4off=new Image();
	img4off.src="images_gen/Btn-Training-Support-off.gif";
	
	img7off=new Image();
	img7off.src="images_gen/Ark-OH-address-off.gif";
	img8off=new Image();
	img8off.src="images_gen/Ark-OH-email-off.gif";
	img9off=new Image();
	img9off.src="images_gen/maxandco-off.gif";
	
	img12off=new Image();
	img12off.src="images_gen/btn_search_off.gif";}

// Activating the menu rollovers

function imgAct(imgName) {
	if (document.images) {
document[imgName].src=eval(imgName+"on.src");
	}
}

// Deactivating the menu rollovers

function imgInact(imgName) {
	if (document.images) {
document[imgName].src=eval(imgName+"off.src");
	}
}

function menuRollOver(obj, newClass) {
	obj.className = newClass;
}

function isEmail(string) {
    if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
        return true;
    else
        return false;
}