The JSseelctbox cannot be displayed.

The check box is bound with a click event. click Select once, click unselect, and so on. This function is okay in ie, but it is okay in the previous two tests in firefox. It can be properly displayed and canceled, but when it is selected again, the check box attribute checkbox value change check box is bound to the click event. click Select once, then click unselect, and so on. This function is okay in ie, but it is okay in the previous two tests in firefox. It can be properly displayed and canceled, but when it is selected again, the checkbox value of the attribute of the check box is changed to "checked". No problem, but the check box does not display the selected status. It is strange that the attribute value is changed but not checked. The code is modified but cannot be correctly displayed. After a long time, you cannot find the cause. Positive Solution: It turns out to be a jQuery version problem. $ ("**"). Attr ("attrName") is used for the Operation attribute, while jQuery uses 1.9. This is a compatibility and stability issue. JQuery API clearly states that 1.6 + jQuery uses prop, especially the checked attribute judgment of checkBox, that is, $ ("input [type = 'checkbox']"). prop ("checked"); $ ("input [type = 'checkbox']"). prop ("disabled", false); $ ("input [type = 'checkbox']"). prop ("checked", true); in use, you can change attr to prop to solve the problem.