// header menu
function swapImg(i,j) { //v3.0
	if(i == '0') document.getElementById('m'+j).src = 'images/menu_right.gif';
	else document.getElementById('m'+j).src = 'images/menu_right2.gif';
}
function swapImg2(i,j) { //v3.0
	if(i == '0'){
		document.getElementById('m1_'+j).src = 'images/y_button_left.gif';
		document.getElementById('m2_'+j).style.background = 'url(images/y_button_bg.gif)';
		document.getElementById('m3_'+j).src = 'images/y_button_right.gif';
	}
	else{
		document.getElementById('m1_'+j).src = 'images/b_button_left.gif';
		document.getElementById('m2_'+j).style.background = 'url(images/b_button_bg.gif)';
		document.getElementById('m3_'+j).src = 'images/b_button_right.gif';
	}
}
// end - header menu
// news and events
function events(){
	document.getElementById('eventsMenu').innerHTML = '<br /><span class="style3"><strong>News and Events</strong><br /><img src="images/arrow2.jpg" /> <a href="bitumatters.php?dir=publication/bitumatters/[1101] Bitumatters - January 2011&imgNo=0">BituMatters - January 2011</a><br /></span>';
}
// end - news and events
<!--
var timeout         = 100;
var closetimer		= 0;
var ddmenuitem      = 0;

// 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';

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

// 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; 
// -->

// email ad checker
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
}