Why Do My Bootstrap Dropdowns Appear Behind Other Elements in Internet Explorer 7?

Bootstrap Dropdowns Appearing Behind Other Elements [Duplicate]

Issue:

In Bootstrap 2.3.1, dropdown menus created using the "dropdown-menu" class appear behind text and other elements on Internet Explorer 7 specifically, despite assigning a high z-index.

Diagnosis:

The problem stems from a stacking context issue. Even though the dropdown has a z-index, it only applies to elements within the same stacking context. In this case, the parent element of the dropdown needs an explicit z-index and position to establish a new stacking context.

Solution:

Modify the CSS as follows:

<code class="CSS">.header-top {
  z-index: 10000;
  position: relative;
}

.header .header-nav ul#nav-account ul.dropdown-menu,
.header .header-nav ul#nav-library ul.dropdown-menu {
  z-index: 1;
}</code>

By setting "z-index: 10000" and "position: relative" on ".header-top," a new stacking context is created. The dropdown menus within this context are then assigned a "z-index: 1" to ensure they are positioned in front of any other content in that context. This establishes the desired layering and resolves the issue in Internet Explorer 7.

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