function selectTip(p_num) {
	MM_changeProp("navDescription0","","style.display","none");
	MM_changeProp("navDescription"+p_num,"","style.display","block");
}

function unTip() {
	MM_changeProp("navDescription1","","style.display","none");
	MM_changeProp("navDescription2","","style.display","none");
	MM_changeProp("navDescription3","","style.display","none");
	MM_changeProp("navDescription4","","style.display","none");
	MM_changeProp("navDescription5","","style.display","none");
	MM_changeProp("navDescription6","","style.display","none");
	MM_changeProp("navDescription7","","style.display","none");
	MM_changeProp("navDescription8","","style.display","none");
	
	MM_changeProp("navDescription0","","style.display","block");
}