求助怎么将水平滚动条放到表格的上方呢？

[WY719116422]

一般情况下，水平滚动条都默认在表格的下方，我现在要把水平滚动条放到表格的上方，我是用JS写的，窗体增加了在任意位置冻结的功能，该怎么写呀，请高手指教……
下面的这段代码就是现在写的，是在这里改吗？怎样改？
/////* Set up the colGroup */
alpha = this.sDataTable.tBodies[0].rows;
for (i=0, j=alpha.length; i<j; i++) {
clean = true;
for (k=0, m=alpha[i].cells.length; k<m; k++) {
if (alpha[i].cells[k].colSpan !== 1 || alpha[i].cells[k].rowSpan !== 1) {
i += alpha[i].cells[k].rowSpan - 1;
clean = false;
break;
}
}
if (clean === true) break; /* A row with no cells of colSpan > 1 || rowSpan > 1 has been found */
}
cleanRow = (clean === true) ? i : 0; /* Use this row index to calculate the column widths */
for (i=0, j=alpha[cleanRow].cells.length; i<j; i++) {
if (i === this.colWidths.length || this.colWidths[i] === -1) {
this.colWidths[i] = alpha[cleanRow].cells[i].offsetWidth;
}
}
for (i=0, j=this.colWidths.length; i<j; i++) {
this.sColGroup.appendChild(document.createElement("COL"));
this.sColGroup.lastChild.setAttribute("width", this.colWidths[i]);
}
this.sDataTable.insertBefore(this.sColGroup.cloneNode(true), this.sDataTable.firstChild);
this.sHeaderTable.insertBefore(this.sColGroup.cloneNode(true), this.sHeaderTable.firstChild);
if (this.fixedCols > 0) {
this.sFDataTable.insertBefore(this.sColGroup.cloneNode(true), this.sFDataTable.firstChild);
this.sFHeaderTable.insertBefore(this.sColGroup.cloneNode(true), this.sFHeaderTable.firstChild);
}