// JavaScript Document
var currRNum = 1 ;
	var maxrow;
	function insertTabRow(tab, cNum,maxrow) {
		if (currRNum < maxrow)
		{
  
		//for ( var i = 0 ; i < cNum ; i ++) {
       		var row = tab.insertRow() ;

		/* 列名保存在数组中
		*/
			currRNum++;             
			row.insertCell().innerHTML ="<input name='upload"+currRNum+"' type='file' size='30' class='form_bmb'>";
        	document.all("num").value = currRNum;
		}

	}

	function deleteTabRow(tab) {
		var rNO = currRNum;
		if (rNO > 1)
		{
		currRNum--;
		document.all("num").value = currRNum;
		tab.deleteRow() ;
		//tab.deleteRow(rNO) ;
		}
	}