Jquery Tablesorting Problem - Sort text column case-insensitively

I am using a Jquery Tablesorter plugin for sor开发者_运维知识库ting a table.I want, when I sort the text column, jquery tablesorter consider the lowercase and uppercase text equally means sort text column case-insensitively.

How can i do it?

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There are various parts in the plugin code such at this at line 701:

return $.trim(s.toLowerCase());

where the values are all converted to lowerCase to avoid case difference problems. Although I think these are implanted nicely you should be able to modify these lines to adjust this. simple remove all toLowerCase methods. but ready them thoroughly before simply just deleting.