var timeout	= 10;
var closetimer	= 0;
var ddmenuitem	= 0;
var ddmenuitem1	= 0;
var ddmenuitem2	= 0;
var ddmenuitem3	= 0;
var i = 0;

function ddmenu(item1, item2, item3)
{	
var varabout = document.getElementById(item1);
var varbusiness = document.getElementById(item2);
var varcontact = document.getElementById(item3);


varabout.style.visibility = 'hidden';
varbusiness.style.visibility = 'hidden';
varcontact.style.visibility = 'hidden';

}
// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
	
	if (id == 'aboutus')
	{
		i++;
		if (i > 25) {return;}
		var elem = document.getElementById("DynamicColumn");
		elem.width = 55 + "px";
		
		
		document.about.src='http://www.foodfare.com.sg/images/btn_about_on.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}
	if (id == 'business')
	{
		i++;
		if (i > 25) {return;}
		var elem = document.getElementById("DynamicColumn");
		elem.width = (55 + 67) + "px";
		
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_on.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}
	if (id == 'career')
	{
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_on.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}
	if (id == 'contact')
	{
		i++;
		if (i > 25) {return;}
		var elem = document.getElementById("DynamicColumn");
		elem.width = (55 + 71 +397 + 264) + "px";
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_on.gif'
	}
	

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

function mclose1(id)
{
	
	
	if (id == 'aboutus')
	{
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}
}
function mclose2(id)
{
	//ddmenuitem2 = document.getElementById(id);
	//if(ddmenuitem2) ddmenuitem1.style.visibility = 'hidden';

	if (id == 'business')
	{
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}

}
function mclose3(id)
{
	//ddmenuitem3 = document.getElementById(id);
	//if(ddmenuitem3) ddmenuitem1.style.visibility = 'hidden';

	if (id == 'career')
	{
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}
	if (id == 'contact')
	{
		document.about.src='http://www.foodfare.com.sg/images/btn_about_off.gif'
		document.business_link.src='http://www.foodfare.com.sg/images/btn_business_off.gif'
		document.career_link.src='http://www.foodfare.com.sg/images/btn_career_off.gif'
		document.contact_link.src='http://www.foodfare.com.sg/images/btn_contact_off.gif'
	}
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}


// close layer when click-out
document.onclick = mclose;