Errors:
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “gnb_menu”.
Stray end tag “a”.
Duplicate ID “main_cont”.
Bad value “https://click.google-analytics.com/redirect?tid=UA-87284930-1&url=https://itunes.apple.com/kr/app/keullaeseukadeu/id1176435331?mt=8&aid=classcard.net&idfa={idfa}&cs=website&cm=web&cn=appdownload” for attribute “href” on element “a”: Illegal character in query: “{” is not allowed.
Duplicate ID “register_start_btn”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “h4” in this context. (Suppressing further errors from this subtree.)
Bad value “_new” for attribute “target” on element “a”: Reserved keyword “new” used.
Duplicate attribute “class”.
Stray end tag “span”.
Duplicate attribute “data-toggle”.
Duplicate ID “donotshow”.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “gnb_menu” was here.
The first occurrence of ID “main_cont” was here.
The first occurrence of ID “register_start_btn” was here.
The first occurrence of ID “donotshow” was here.
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