function showAdvSearch(){
	
	if(document.getElementById('advanced_search').style.display == "block"){
		hide('advanced_search');
	}
	else{
		show('advanced_search', 'block');
	}
}

function show(id, how){
	
	document.getElementById(id).className='';
	
	if (navigator.appName == 'Microsoft Internet Explorer') {
		element=document.getElementById(id).style;
		element.display = 'block';
	}
	else {
		element=document.getElementById(id).style;
		element.display = how;
	}
}

function hide(id){
	
	element=document.getElementById(id).style;
	element.display = 'none';
}