var PageLoaded = 0;

window.onload = function() {
	PageLoaded = 1;
}

function navwait(i) {
	if ( document.getElementById && document.getElementById(i) !== null ) {
		navinit();
	} else if ( !PageLoaded ) {
		setTimeout('navwait(\''+i+'\')', 100);
	}
}

function navinit() {
	f = document.getElementById('searchprevnext');
	f.style.display="none";

	b = document.getElementById('q');	
	for( i=0; i<b.form.elements.length; i++ ) {
		if( b.form.elements[i].type=="checkbox" ) {
			b.form.elements[i].onclick = navrecheck;
		}
	}
	
	b.onblur = navrecheck;
	b.onchange = navrecheck;
	b.onkeyup = navrecheck;
	b.onreset = navrecheck;
	navrecheck();
}

function navrecheck() {
	b = document.getElementById('q');
	n = document.getElementById('normalprevnext');
	f = document.getElementById('searchprevnext');
	
	find = b.value;
	if(!find ) {
		for( i=0; i<b.form.elements.length; i++ ) {
			if( b.form.elements[i].checked ) {
				find = 1;
				break;
			}
		}					
	}
	
	if( find ) {
		n.style.display="none";
		f.style.display="";
	} else {
		n.style.display="";
		f.style.display="none";
	}
	
}

navwait('q');