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
	img0on=new Image();
	img0on.src="images_gen/btn_home_on.gif";
	img1on=new Image();
	img1on.src="images_gen/btn_about_on.gif";
	img2on=new Image();
	img2on.src="images_gen/btn_careers_on.gif";
	img3on=new Image();
	img3on.src="images_gen/btn_training_on.gif";
	img4on=new Image();
	img4on.src="images_gen/btn_news_on.gif";
	img5on=new Image();
	img5on.src="images_gen/btn_contact_on.gif";
	img6on=new Image();
	img6on.src="images_gen/btn_sign_in_on.gif";
	img7on=new Image();
	img7on.src="images_gen/btn_engin_on.gif";
	img8on=new Image();
	img8on.src="images_gen/btn_proj_man_on.gif";
	img9on=new Image();
	img9on.src="images_gen/btn_const_on.gif";
	img10on=new Image();
	img10on.src="images_gen/btn_subsea_on.gif";
	img11on=new Image();
	img11on.src="images_gen/btn_proj_res_on.gif";
	img12on=new Image();
	img12on.src="images_gen/btn_search_on.gif";
	img13on=new Image();
	img13on.src="images_gen/btn_print_on.gif";
	img14on=new Image();
	img14on.src="images_gen/btn_email_on.gif";
	img15on=new Image();
	img15on.src="images_gen/btn_subscribe_on.gif";
	img16on=new Image();
	img16on.src="images_gen/btn_strategic_on.gif";
	img17aon=new Image();
	img17aon.src="images_gen/btn_apply_on.gif";
	img17bon=new Image();
	img17bon.src="images_gen/btn_apply_on.gif";
	
	imgH1on=new Image();
	imgH1on.src="images_gen/home_btn_engin-on.jpg";
	imgH2on=new Image();
	imgH2on.src="images_gen/home_btn_proj_man-on.jpg";
	imgH3on=new Image();
	imgH3on.src="images_gen/home_btn_const-on.jpg";
	imgH4on=new Image();
	imgH4on.src="images_gen/home_btn_proj_res-on.jpg";
	imgH5on=new Image();
	imgH5on.src="images_gen/home_btn_subsea-on.jpg";
	
// Preload Rollover "off" images
	img0off=new Image();
	img0off.src="images_gen/btn_home_off.gif";
	img1off=new Image();
	img1off.src="images_gen/btn_about_off.gif";
	img2off=new Image();
	img2off.src="images_gen/btn_careers_off.gif";
	img3off=new Image();
	img3off.src="images_gen/btn_training_off.gif";
	img4off=new Image();
	img4off.src="images_gen/btn_news_off.gif";
	img5off=new Image();
	img5off.src="images_gen/btn_contact_off.gif";
	img6off=new Image();
	img6off.src="images_gen/btn_sign_in_off.gif";
	img7off=new Image();
	img7off.src="images_gen/btn_engin_off.gif";
	img8off=new Image();
	img8off.src="images_gen/btn_proj_man_off.gif";
	img9off=new Image();
	img9off.src="images_gen/btn_const_off.gif";
	img10off=new Image();
	img10off.src="images_gen/btn_subsea_off.gif";
	img11off=new Image();
	img11off.src="images_gen/btn_proj_res_off.gif";
	img12off=new Image();
	img12off.src="images_gen/btn_search_off.gif";
	img13off=new Image();
	img13off.src="images_gen/btn_print_off.gif";
	img14off=new Image();
	img14off.src="images_gen/btn_email_off.gif";
	img15off=new Image();
	img15off.src="images_gen/btn_subscribe_off.gif";
	img16off=new Image();
	img16off.src="images_gen/btn_strategic_off.gif";
	img17aoff=new Image();
	img17aoff.src="images_gen/btn_apply_off.gif";
	img17boff=new Image();
	img17boff.src="images_gen/btn_apply_off.gif";
	
	imgH1off=new Image();
	imgH1off.src="images_gen/home_btn_engin-off.jpg";
	imgH2off=new Image();
	imgH2off.src="images_gen/home_btn_proj_man-off.jpg";
	imgH3off=new Image();
	imgH3off.src="images_gen/home_btn_const-off.jpg";
	imgH4off=new Image();
	imgH4off.src="images_gen/home_btn_proj_res-off.jpg";
	imgH5off=new Image();
	imgH5off.src="images_gen/home_btn_subsea-off.jpg";}

// 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");
	}
}