pic1= new Image(479,242); 
pic1.src="seychelles_getaway.jpg"; 
pic2= new Image(479,242); 
pic2.src="seychelles_safari.jpg"; 
pic3= new Image(479,242); 
pic3.src="seychelles_capetown.jpg"; 
previmg = 'getaway';
function dotover(imgid) {	
	if(document.getElementById) {
		document.getElementById(previmg).style.visibility = "hidden";
		document.getElementById(imgid).style.visibility = "visible";
		document.getElementById("SAFARI").src  = 'seychelles_'+imgid+'.jpg';
	previmg = imgid;
	}
}