我正在尝试能够在我的页面上将这些工具提示作为我的Tab键顺序的一部分进行制表，但是标签会在第一个工具提示处停止。我的Javascript代码中的try catch语句有问题吗？
landingTooltip = {
locked :false,
initialize: function(){
if (dojo.byId('pickup-cycle')){
this.buttons = dojo.query('.button-link', dojo.byId('pickup- cycle'));
}
else{
return;
}
var _this = this;
dojo.forEach(
_this.buttons,
function(obj){
Hoverable.disconnect(obj)
domExtender.connect(obj,"onmouseenter",function(e){
_this.show(domExtender.closest(obj, '.step'), obj);
});
// dojo.connect(obj,"onmouseleave",function(e){
// _this.hide(domExtender.closest(obj, '.step'), obj, null);
// });
domExtender.connect(dojo.query('a', obj)[0],"onfocus",function(e){
_this.show(domExtender.closest(obj, '.step'), obj);
});
}
);
},
show: function(el, t){
if (this.locked == true){
return;
}
this.locked = true;
var t = t;
var _this = this;
dojo.addClass(dojo.query('span', t)[0], 'hover');
this.tt = dojo.query('.tool-tip', el)[0];
var placed = dojo.place(
_this.tt,
dojo.body(),
'first'
);
dojo.style(_this.tt, 'display', 'block');
_this.tt.focus();
var setFocus = dojo.query('h5', placed)[0];
setFocus.focus();
this.inst = dojo.connect(_this.tt,"onblur",function(e){
if (domExtender.closest(e.target, 'div.tool-tip') == null) {
_this.hide(domExtender.closest(t, '.step'), t, true);
}
});
this.inst1 = dojo.connect(dojo.body(), 'onclick',function(e){
//alert(domExtender.closest(e.target, 'div.tool-tip'));
if (domExtender.closest(e.target, 'div.tool-tip') == null){
_this.hide(domExtender.closest(t, '.step'), t, true);
}
});
},
hide: function(el, t, blur){
// if (this.locked == true){
// return;
// }
this.locked = true;
var _this = this;
if (this.inst){
dojo.disconnect(_this.inst);
}
if (this.inst1){
dojo.disconnect(_this.inst1);
}
dojo.removeClass(dojo.query('span', t)[0], 'hover');
var placed = dojo.place(
_this.tt,
el,
'first'
);
dojo.style(placed, 'display', 'none');
_this.locked = false;
try {
var setFocus = domExtender.next(el);
setFocus.focus();
} catch (e) {
}
}
}