// JavaScript Document

function opacity(id, opacStart, opacEnd, millisec) { 
    //speed for each frame 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 
	
	document.getElementById(id).style.display = "block";	
    //determine the direction for the blending, if start and end are the same nothing happens 
    if(opacStart > opacEnd) { 
        for(i = opacStart; i >= opacEnd; i--) { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            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 + ")"; 
}


//close all the other DIVS
function closeMenu(id1,id2,id3){
	document.getElementById(id1).style.display = 'none';
	document.getElementById(id2).style.display = 'none';
	document.getElementById(id3).style.display = 'none';
}

//close all the other 4 DIVS
function closeMenu4(id1,id2,id3,id4){
	document.getElementById(id1).style.display = 'none';
	document.getElementById(id2).style.display = 'none';
	document.getElementById(id3).style.display = 'none';
	document.getElementById(id4).style.display = 'none';
}