// toggle display/hide

function toggle( targetId ){
        ie4 = (document.all)? true:false
        ns6 = (!document.all && document.getElementById)?true:false
        if (ie4){
                target = document.all[targetId];
                        if (target.style.display == "none"){
                                target.style.display = "";
                        }
                        else {
                                target.style.display = "none";
                        }
        }
        else if (ns6){
                target = document.getElementById(targetId);
                        if (target.style.display == "none"){

                                target.style.display = "";
                        }       
                        else {  
                                target.style.display = "none";
                        }
        }                       
}

// preload images

function preload() {
   var myimages=new Array()
   for (i=0;i<preload.arguments.length;i++) {
      myimages[i]=new Image()
      myimages[i].src=preload.arguments[i]
   }
}

// write to layer

function writeto(name, message) {
    if (document.layers) {
        document.layers[name].document.close();
        document.layers[name].document.write(message);
        document.layers[name].document.close();
    } else {
        if (document.all) {
            eval("document.all." + name + ".innerHTML='" + message + "'");
        } else {
            document.getElementById(name).innerHTML = message;
        }
    }
}

// mouseover events

function rollover(item) {
	if (item == "one") {
		one.src='1b.jpg';
		writeto('about','&raquo; ABOUT');
	}
	if (item == "two") {
		two.src='2b.jpg';
		writeto('who','&raquo; WHO WE ARE');
	}
	if (item == "three") {
		three.src='3b.jpg';
		writeto('courses','&raquo; COURSES');
	}
	if (item == "four") {
		four.src='4b.jpg';
		writeto('where','&raquo; WHERE WE ARE');
	}
}

// mouseout events

function rollout(item) {
	if (item == "one") {
		one.src='1a.jpg';
		writeto('about','<a class=menuhead href=javascript:toggle("menu1");>ABOUT</a>');
	}
	if (item == "two") {
		two.src='2a.jpg';
		writeto('who','<a class=menuhead href=javascript:toggle("menu2");>WHO WE ARE</a>');
	}
	if (item == "three") {
		three.src='3a.jpg';
		writeto('courses','<a class=menuhead href=javascript:toggle("menu3");>COURSES</a>');
	}
	if (item == "four") {
		four.src='4a.jpg';
		writeto('where','<a class=menuhead href=javascript:toggle("menu4");>WHERE WE ARE</a>');
	}
}