JS实现一键清除填报内容-https://help.fanruan.com/finereport/doc-view-3434.html
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for (i = 0; i < len; i++)
{
var cr1 = FR.cellStr2ColumnRow("C2");
_g().setCellValue(0, cr1.col, i+cr1.row,"");
var cr2 = FR.cellStr2ColumnRow("B2");
_g().setCellValue(0, cr2.col, i+cr2.row,"");
}