function shockscreen() {
        self.name = "main"; // names current window as "main"
                window.open("","shockscreen","width=500,height=400,resizable=yes,status=no,menubar=yes,scrollbars=yes")
                }





        if (document.images) {            // Active Images
            img1on = new Image(); 
            img1on.src = "summer_school_images/home_ovr.gif"; 
            img2on = new Image();
            img2on.src = "summer_school_images/location_ovr.gif"; 
            img3on = new Image();
            img3on.src = "summer_school_images/english-classes_ovr.gif";
            img4on = new Image();
            img4on.src = "summer_school_images/activities_ovr.gif";
            img5on = new Image();
            img5on.src = "summer_school_images/accommodation_ovr.gif";

            img6on = new Image();
            img6on.src = "summer_school_images/secure-booking_ovr.gif";

            img1off = new Image(); 
            img1off.src = "summer_school_images/home.gif"; 
            img2off = new Image();
            img2off.src = "summer_school_images/location.gif"; 
            img3off = new Image();
            img3off.src = "summer_school_images/english-classes.gif";
            img4off = new Image();
            img4off.src = "summer_school_images/activities.gif";
            img5off = new Image();
            img5off.src = "summer_school_images/accommodation.gif";

        
            img6off = new Image();
            img6off.src = "summer_school_images/secure-booking.gif";

        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}






var highlightcolor="#ffffff"

var ns6=document.getElementById&&!document.all
var previous=''
var eventobj

//Regular expression to highlight only form elements
var intended=/INPUT|TEXTAREA|SELECT|OPTION/

//Function to check whether element clicked is form element
function checkel(which){
if (which.style&&intended.test(which.tagName)){
if (ns6&&eventobj.nodeType==3)
eventobj=eventobj.parentNode.parentNode
return true
}
else
return false
}

//Function to highlight form element
function highlight(e){
eventobj=ns6? e.target : event.srcElement
if (previous!=''){
if (checkel(previous))
previous.style.backgroundColor=''
previous=eventobj
if (checkel(eventobj))
eventobj.style.backgroundColor=highlightcolor
}
else{
if (checkel(eventobj))
eventobj.style.backgroundColor=highlightcolor
previous=eventobj
}
}