问如何使用JS/jQuery在HTML表格中选择一个特定的单元格？

EN

var td = $(td) // selects all <td> elements

var tdCheck6 = $(...) // selects cell text of cell in 1st row and 6th column
var tdCheck7 = $(...) // selects cell text of cell in 1st row and 7th column 

/* using Monday as the first day of the week, if (Saturday is the first day 
of one particular month AND the month has 31 days) OR (Sunday is the first day 
of the month AND the month has more than 29 days: that month will need 6 rows) */

if ((tdCheck6 == "1" && daysInMonth == 31) || (tdCheck7 == "1" && daysInMonth > 29)) {
     td.style.cssText = "height: 100px; width: 14.29%;";
} 
// use default cell dimensions for 5 rows
else {
     td.style.cssText = "height: 120px; width: 14.29%;"; 
}