//Êó±êÒƶ¯Çл»Ñùʽ
function menu(a) {
    switch (a) {
        case 1:
            eval("divtop.className='DivFloatTool_01';");
            break;
        case 2:
            eval("divtop.className='DivFloatTool_02';");
            break;
        case 3:
            eval("divtop.className='DivFloatTool_03';");
            break;
        case 4:
            eval("divtop.className='DivFloatTool_04';");
            break;
        case 5:
            eval("divtop.className='DivFloatTool_05';");
            break;
        case 6:
            eval("divtop.className='DivFloatTool_06';");
            break;
    }  
      
}