var dom=(document.getElementById) ? true:false;
var timer;

function hideDropdown(objId)
{
    if (dom){
	 document.getElementById(objId).style.visibility = 'hidden';
		if (objId == "aboutColumbus") {
   			 if (document.getElementById('residency')) document.getElementById('residency').style.visibility = 'visible';
		}
		
		if (objId == "ourProducts") {
			if (document.getElementById('ExactDestination')) document.getElementById('ExactDestination').style.visibility = 'visible';
		}
		
	}
}
 
function showDropdown(objId)
{
    if (dom) {
		document.getElementById(objId).style.visibility = 'visible';
		if (objId == "aboutColumbus") {
   			 if (document.getElementById('residency')) document.getElementById('residency').style.visibility = 'hidden';
		}
	
		if (objId == "ourProducts") {
			if (document.getElementById('ExactDestination')) document.getElementById('ExactDestination').style.visibility = 'hidden';
		}
		
	}
}

function changeImageOver(imgPath,objId) { 
document.getElementById(objId).src = [imgPath+objId+"_over.gif"];
}

function changeImageOut(imgPath,objId) { 
document.getElementById(objId).src = [imgPath+objId+"_up.gif"];
}