<link rel="stylesheet" type="text/css" href="../../codebase/skins/dhtmlxform_dhx_skyblue.css">
    
    <script src="../../codebase/dhtmlxcommon.js"></script>
    <script src="../../codebase/dhtmlxform.js"></script>
    
 
 
    
    <div id="listObj" style="position: relative; width: 250px;"></div>
    <div>
        <input type="button" value="Check All" onclick="check(true);">
        <input type="button" value="UnCheck All" onclick="check(false);">
    </div>
    <script>
var dhxList;
function doOnLoad() {
    dhxList = new dhtmlXForm("listObj");
    dhxList.loadStruct("../common/dhxform2.xml?" + new Date().getTime());
}
function check(toCheck) {
    dhxList.forEachItem(function(name) {
        if (dhxList.getItemType(name) == "checkbox")
            dhxList[(toCheck ? "checkItem": "uncheckItem")](name);
    });
}</script>