function switchDiv(div_id, li_id) {
	var style_sheet = getStyleObject(div_id);
	if (style_sheet) {
		hideAll();
	  	changeObjectVisibility(div_id,"visible");
		el = document.getElementById(li_id); 
		el.className = 'on';
	} 
}

function getStyleObject(objectId) {
	if(document.getElementById && document.getElementById(objectId)) {
		return document.getElementById(objectId).style;
	}
	else if (document.all && document.all(objectId)) {  
		return document.all(objectId).style;
	} 
	else if (document.layers && document.layers[objectId]) { 
		return document.layers[objectId];
	} else {
		return false;
	}
}

function hideAll() {
	changeObjectVisibility('fragment_1',"hidden");
	changeObjectVisibility('fragment_2',"hidden");
	changeObjectVisibility('fragment_3',"hidden");
	changeObjectVisibility('fragment_4',"hidden");
/*	changeObjectVisibility('fragment_5',"hidden");    */
	changeObjectVisibility('fragment_6',"hidden");
	changeObjectVisibility('fragment_7',"hidden");
	changeObjectVisibility('fragment_8',"hidden");
	changeObjectVisibility('fragment_9',"hidden");
/*	changeObjectVisibility('fragment_10',"hidden");
	changeObjectVisibility('fragment_11',"hidden");
*/
	changeObjectVisibility('fragment_12',"hidden");
	el = document.getElementById('frag_1'); 
	el.className = 'off';
	el = document.getElementById('frag_2'); 
	el.className = 'off';
	el = document.getElementById('frag_3'); 
	el.className = 'off';
	el = document.getElementById('frag_4'); 
	el.className = 'off';
/*	el = document.getElementById('frag_5');
	el.className = 'off';       
	el = document.getElementById('frag_6'); 
	el.className = 'off';
*/
	el = document.getElementById('frag_7'); 
	el.className = 'off';
	el = document.getElementById('frag_8'); 
	el.className = 'off';
	el = document.getElementById('frag_9'); 
	el.className = 'off';
/*	el = document.getElementById('frag_10'); 
	el.className = 'off';
	el = document.getElementById('frag_11'); 
	el.className = 'off';
*/
	el = document.getElementById('frag_12'); 
	el.className = 'off';
}

function changeObjectVisibility(objectId, newVisibility) {
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
		styleObject.visibility = newVisibility;
		return true;
    } else {
		return false;
    }
}