Jquery选择器特殊字符问题

场景： $("#" + AAA + "")，AAA代表某表单ID

当AAA为普通字符串时，ok；

当AAA含有特殊符号时（eg:a.b），获取不到该对象；

原因：特殊符号会进行转义，上面那种方式就无法获取的该ID。

// Does not work:

$( "#some:id" )

// Works!

$( "#some\\:id" )

// Does not work:

$( "#some.id" )

// Works!

$( "#some\\.id" )

解决：

The following function takes care of escaping these characters and places a "#" at the beginning of the ID string:

function jq( myid ) {

return "#" + myid.replace( /(:|\.|\[|\]|,)/g, "\\$1" );

}

The function can be used like so:

$( jq( "some.id" ) )

http://learn.jquery.com/using-jquery-core/faq/how-do-i-select-an-element-by-an-id-that-has-characters-used-in-css-notation/