11...

首先分清jQuery对象和DOM对象，这两者可相互转化，如：var$cr=$("#cr");//jquery对象varcr=$cr[0];//DOM对象varcr=$cr.get(0);//DOM对象varcr=document.getElementById("cr");//DOM对象var$cr=$(cr);//jq...

http://api.jquery.com/text/Getthecombinedtextcontentsofeachelementinthesetofmatchedelements,includingtheirdescendants后裔,orsetthetextcontentsofthematchedelements...