function hideMenu() {
 var MenuDiv, showMenuDiv, hideMenuDiv, leftColumn;

 MenuDiv = getObject("treeDiv");
 showMenuDiv = getObject("showMenuDiv");
 hideMenuDiv = getObject("hideMenuDiv");
 leftColumn = getObject("wtLeftColumn");
 rightColumn = getObject("wtRightColumn");

                if(MenuDiv){MenuDiv.style.display="none";}
                if(hideMenuDiv ){hideMenuDiv .style.display="none";}
                if(showMenuDiv){showMenuDiv.style.display="block";}
                if(leftColumn){
                    leftColumn .className = "Enterprise_TwoColumns_LeftFrozen_Collapsed";
                    if(rightColumn){
                        rightColumn .className = "Enterprise_TwoColumns_RightLiquid_Expanded";                                         
                    }
                }
}

function showMenu() {
 var MenuDiv, showMenuDiv, hideMenuDiv, leftColumn;

 MenuDiv = getObject("treeDiv");
 showMenuDiv= getObject("showMenuDiv");
 hideMenuDiv = getObject("hideMenuDiv");
 leftColumn = getObject("wtLeftColumn");
 rightColumn = getObject("wtRightColumn");

                if(MenuDiv){MenuDiv.style.display="block";}
                if(hideMenuDiv){hideMenuDiv.style.display="block";}
                if(showMenuDiv){showMenuDiv.style.display="none";}
                if(leftColumn){
                    leftColumn .className = "Enterprise_TwoColumns_LeftFrozen";
                    if(rightColumn){
                        rightColumn .className = "Enterprise_TwoColumns_RightLiquid";                                         
                    }                    
                }
}