var visible = false;
function ChgVis(sender, target){
    target = document.getElementById("tbl"+target);
    
    if(target.style.display == "none"){
        target.style.display = "block";
        sender.src="images/minus.gif";
        }
    else{
        target.style.display = "none";
        sender.src="images/plus.gif";
        }
}

function ChgVisAll(sender){
    
    var src;
    var display;
    if(visible){
        src = "images/minus.gif";
        display = "block";
        visible = false;
        sender.src = "images/minusall.gif";
    }
    else
    {   display ="none";
        src = "images/plus.gif";
        visible = true;
        sender.src = "images/plusall.gif";
    } 
    var detailsList = document.getElementsByTagName("TABLE");
    var expanders = document.getElementsByTagName("IMG");
    
    for(var i = 0; i < detailsList.length; i++){
        if(detailsList[i].summary=="details")
             detailsList[i].style.display = display;
    }
    
    for(var i = 0; i < expanders.length; i++){

        if(expanders[i].alt=="dts")
             expanders[i].src = src;
    }

    
}