table 合并单元格方法

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<span style="font-family:Microsoft YaHei;font-size:14px;">//合并单元格function cellHandler(){    var tab = document.getElementById("data_table");//maxCol循环列    var maxCol = 2, val, count, start;         for(var col = maxCol-1; col >= 0 ; col--){        count = 1;        val = "";        for(var i=0; i<tab.rows.length; i++){            if(val == tab.rows[i].cells[col].innerHTML){                count++;            }else{                if(count > 1){ //合并                    start = i - count;                    tab.rows[start].cells[col].rowSpan = count;                    for(var j=start+1; j<i; j++){                        tab.rows[j].cells[col].style.display = "none";                    }                    count = 1;                }                val = tab.rows[i].cells[col].innerHTML;            }        }        if(count > 1 ){ //合并，最后几行相同的情况下            start = i - count;            tab.rows[start].cells[col].rowSpan = count;            for(var j=start+1; j<i; j++){                tab.rows[j].cells[col].style.display = "none";            }        }    }};</span>

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