function ItemControl(idName, objCnt) {

        var bol = document.getElementById(idName).checked;

        if (bol) {
            for (i = 1; i < objCnt + 1; i++) {
                enable(idName + i);
                chgOnColor(idName + "tr");
            }
        } else {
            for (i = 1; i < objCnt + 1; i++) {
                disable(idName + i);
                chgOffColor(idName + "tr");
            }
        }
    }

    function chgOnColor(idName) {
        if (idName.substring(0, 3) == "buy") {
            document.getElementById(idName).className  = "buy_on";
        } else { 
            document.getElementById(idName).className  = "sell_on";
        }
    }

    function chgOffColor(idName) {
        if (idName.substring(0, 3) == "buy") {
            document.getElementById(idName).className  = "buy_off";
        } else {
            document.getElementById(idName).className  = "sell_off";
        }
    }
        
 
    function disable(idName) {  
        document.getElementById(idName).disabled  = true;
    }  

    function enable(idName) {
        document.getElementById(idName).disabled  = false; 
    }   
    
    function nextPage(idName, pageId) {
        document.getElementById(idName).action = pageId;
        document.getElementById(idName).submit();
    }