js统计Table单元格实际行列 不用rowSpan colSpan，而用offsetLeft

计算每个单元格所在的实际行、列，而不是cellIndex

 

IE8、FireFox下测试可用

 

具体代码如下：

 

/**
 浏览器判断
 */
var Sys = {};
var ua = navigator.userAgent.toLowerCase();
if (window.ActiveXObject)
	Sys.ie = ua.match(/msie ([\d.]+)/)[1];
else if (document.getBoxObjectFor)
	Sys.firefox = ua.match(/firefox\/([\d.]+)/)[1];
	
function containsArray(array, obj) {
	for (var i = 0; i < array.length; i++) {
		if (array[i] == obj) {
			return i;
			break;
		}
	}
	return -1;
}

Array.prototype.contains = function(obj) {
	return containsArray(this, obj);
}

function PrintTableToExcel(tableId) {

	var offsetLeftArray = new Array();
	var cell;// 单元格Dom
	var col;// 单元格实际所在列
	var cellStr;// 每个cell以row,col,rowSpan,colSpan,value形式
	var cellStrArray = [];
	var objTab = document.getElementById(tableId);

	// 遍历第一次取出offsetLeft集合
	for (var i = 0; i < objTab.rows.length; i++) {
		for (var j = 0; j < objTab.rows[i].cells.length; j++) {
			cell = objTab.rows[i].cells[j];
			if (offsetLeftArray.contains(cell.offsetLeft) == -1)
				offsetLeftArray.push(cell.offsetLeft);
		}
	}

	offsetLeftArray.sort(function(x, y) { return parseInt(x) - parseInt(y); });
	alert("offsetLeft集合:" + offsetLeftArray.join(','));

	// 遍历第二次生成cellStrArray
	for (var i = 0; i < objTab.rows.length; i++) {
		for (var j = 0; j < objTab.rows[i].cells.length; j++) {
			cell = objTab.rows[i].cells[j];
			col = offsetLeftArray.contains(cell.offsetLeft);
			cellStr = i + ',' + col + ',' + cell.rowSpan + ',' + cell.colSpan + "," + (Sys.firefox?cell.textContent:cell.innerText);
			cellStrArray.push(cellStr);
		}
	}

	// 显示
	var str = "行，列，rowSpan,colSpan,值\n";
	str += cellStrArray.join('\n');
	alert(str);

}

 

 

附件为例子.