(不是很完美)select列表项关联（(not perfect) select list item association）.docVIP

(不是很完美)select列表项关联（(not perfect) select list item association） JS to do with the select multi-level association, need to know in advance is a few levels. Several select elements to create a corresponding label First。 All types of circulating ASP, whether it is like or the parent class, check the design when several class categories, corresponding to manually create several select tags, they did not set the ID value (to manually set the trouble, wanted to make a full automatic generation (create) select to want to forget it, so that is not perfect). All types of circulation will include several projects: each row in the database: ID (Wei Yizhi), name, and class ID The 1 type is empty on the line. Then use the JavaScript two-dimensional array corresponding to accept all array[][], one is a sequence of two-dimensional meaning, is the specific content, One cycle start, Read in the two storage class ID elements, In the above mentioned two determine the parent class ID= is a list. In the creation of a option object (select each item is a option object); Set the value of a option object and display text. The value is out of the above mentioned in the ID Library (the only item), display text type name; Added to the select element existing in the label. A label because it is unchanged, and is the beginning of all visible content so it only once in body onload= function operation, This shows a category on the show The following shows two levels of content. Two level content change condition is in the choice of a list of options, then in the class (parent) list element set on onchange events (written function) Specifically: choose a class, read the selected item value (not visible display name) In the cycle of one-dimensional function, Extraction of two-dimensional function in the superclass ID= just extracted. If equal so that a list of options subordinate list, Then create the optiong settings and display text, Join have two select objects to acquire the object by ID. Three