function chooseType(id){
	document.getElementById('searchTypeValue').value = id;
	document.getElementById('searchTypeMenu_1').className = '';
	document.getElementById('searchTypeMenu_2').className = '';
	document.getElementById('searchTypeMenu_'+id).className = 'checked';
	document.getElementById('searchTypeIcon').src = 'http://graphics.suite101.com/icon_searchfilter_'+id+'.gif';
	toggleSearchTypes();
}

function toggleSearchTypes(){
	var id = document.getElementById('searchTypeValue').value;
	if(document.getElementById('searchTypes').style.visibility != 'visible'){
		document.getElementById('searchTypeIcon').src = 'http://graphics.suite101.com/icon_searchfilter_'+id+'_active.gif';
		document.getElementById('searchTypes').style.visibility = 'visible';
	}else{
		document.getElementById('searchTypeIcon').src = 'http://graphics.suite101.com/icon_searchfilter_'+id+'.gif';
		document.getElementById('searchTypes').style.visibility = 'hidden';
	}
}

function fadeOpacity(id, opacStart, opacEnd, millisec) { 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 
	var object = document.getElementById(id).style; 
    if(opacStart > opacEnd) { 
        for(i = opacStart; i >= opacEnd; i--) { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            setTimeout("document.getElementById('"+id+"').style.display='none'", millisec);
            timer++; 
        } 
    } else if(opacStart < opacEnd) { 
        for(i = opacStart; i <= opacEnd; i++) 
            { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        }
       
    } 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) { 
    var object = document.getElementById(id).style; 
    object.opacity = (opacity / 100); 
    object.MozOpacity = (opacity / 100); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
}