javascript函数无法正常工作。 （目标）

function hide(target) {
document.getElementById(target).style.display = 'none';
var ID = document.getElementById(target).value;

For some reason, the display = 'none' part is working perfect, how ever when i pass 'ID' (var ID) via ajax - it just says Undefined.

出于某种原因,display ='none'部分工作正常,当我通过ajax传递'ID'(var ID)时 - 它只是说Undefined。

Any ideas how to get Var ID to be the same as (target) the ID of the div tag?

任何想法如何让Var ID与(目标)div标签的ID相同?

Thanks.

1 个解决方案

#1

I would suggest changing the routine to use a more defensive technique:

我建议改变常规以使用更具防御性的技术:

    function hide(target) {
        if ( typeof target != "string") {
            return;
        }
        var el = document.getElementById(target);

        if ( typeof el == "object" ) {
            el.style.display = 'none';

            var ID = el.value;

            // do something with ID
        }
    }