asp.net call jquery function in the background

About ASP.net the jquery function is called in the background. This should be a relatively simple function, but I was stumped for a long time. I finally found it in a post recently. Here's a record.   This is the front desk JS method: function AA () {alert ("AAAA"); $ ("#test"). Slidetoggle ("100"); }
Background code Call:

1	Clientscript.registerstartupscript (Clientscript.gettype (), "MyScript", "<script>aa ();</script>");

In this case, the corresponding jquery event cannot be invoked.

JS to pay attention to the order of loading, in the head of the added JS code if you want to access the DOM words generally to put into the window.onload inside, or directly to the code behind the elements added. If the generated JS is placed before the HTML tag, then even jquery is not loaded into the write function.

Positive solution:

Clientscript.registerstartupscript (Clientscript.gettype (), "MyScript", "<script>window.onload=function ()" { AA ();} </script> ");