function big(lyr){
//	document.all[lyr].style.height='180px'; 
    switch(lyr){
        case "Layer1": document.all[lyr].style.height='300px'; break;
        case "Layer2": document.all[lyr].style.height='210px'; break;
        case "Layer3": document.all[lyr].style.height='240px'; break;
        case "Layer4": document.all[lyr].style.height='390px'; break;
        case "Layer5": document.all[lyr].style.height='330px'; break;
        case "Layer6": document.all[lyr].style.height='200px'; break;
        case "Layer7": document.all[lyr].style.height='180px'; break;
    }
}

/* small() makes selected layer shorter (height property)*/
function small(lyr) {
	document.all[lyr].style.height='33px';
}

/* start() makes all layers short to start with (height property)*/
function start() {
	document.all.Layer1.style.height='33px';
	document.all.Layer2.style.height='33px';
	document.all.Layer3.style.height='33px'; 
	document.all.Layer4.style.height='33px'; 
	document.all.Layer5.style.height='33px'; 
	document.all.Layer6.style.height='33px'; 
	document.all.Layer7.style.height='33px'; 
}