function toggleScalePriceDisplay(groupId, firstRow, numberOfRows) {

    var text = document.getElementById(groupId);
    if (!text.firstChild) {
       text.appendChild(document.createTextNode("-"));   
    }

    for (var i = firstRow; i < firstRow + numberOfRows; i++) { 
    
        var rowId = groupId + "-" + i; 
        row = document.getElementById(rowId);
		
        if (row.style.display == "none") {
            row.style.display = "";
            text.firstChild.nodeValue = 'Collapse Price List';
        }
        else {
            row.style.display = "none";
            text.firstChild.nodeValue = 'Expand Price List';
        }
    }
}