Simple navigation problem

Hi there

Im trying to make a simple navigation, all it needs to do is onRollOver change the color of the movie clips background and delete the current page rollover. Im sure im just making a stupid mistake. Any help would be appreciated. see code below:

var currentPage = “ibuy”;

function deleteMouseEvents()
{
delete nav.ibuy_button.onRollOver;
delete nav.icool_button.onRollOver;
}

deleteMouseEvents()
checkPage()

function checkPage()
{
if( currentPage == “ibuy”)
{

        var colorful = new Color("_root.nav.ibuy_button.filler");
        colorful.setRGB(0x8CC042);    
        nav.ibuy_button.ibuy_txt.textColor = 0xffffff;    
        
        nav.icool_button.onRelease = function()
        {                            
        currentPage = "icool";
        checkPage();
        deleteMouseEvents()
        }            

}        

if( currentPage == "icool")
{    
                    
        var colorful = new Color("_root.nav.icool_button.filler");
        colorful.setRGB(0xEB7D31);    
        nav.icool_button.icool_txt.textColor = 0xffffff;    

        nav.ibuy_button.onRelease = function()            
        {
            
            checkPage();                    
            deleteMouseEvents()        
        }            

}

}
checkPage();