how to get id from string which ends with certain word (regexp)
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i want to get `id` which is ends with "_theTable" in string using regex. but i am not getting that . i am using this code:-

     var str="<table id='dnn_ctl_123_theTable'><tr><td></td></tr></table>";
     var rexexp = new RegExp("\b\w*_theTable\b"); 
     var matchedwrd=rexexp.exec(str);

Please guide how to do this?  
Thanks in Advance