Javascript & JQuery & CSS

<script type="text/javascript">
<!--

var task_count=1;

function fnc_table_delete(e)
{
	var obj = find_parent_tag(e,'td');
	if(obj.parentNode)
		var idx = obj.parentNode.rowIndex;
	else
		var idx = obj.parentElement.rowIndex;
	var tRow = tb1_task.deleteRow(idx);
	task_count--;
}

function find_parent_tag(e,tag){
	if(e.target)
		var obj = e.target
	else
		var obj = e.srcElement
	while (obj.tagName.toLowerCase() != tag)
	{
		if(obj.parentNode)
			obj = obj.parentNode
		else
			obj = obj.parentElement
		if(typeof(obj.tagName)=='undefined') break;
	}
	return obj
}


function fnc_table_insert() {
		task_count++;

		
		if(document.getElementById){
			var Tbl = document.getElementById('tb1_task');
		} else {
			var Tbl = document.all['tb1_task'];
		}
		var tRow = Tbl.insertRow(-1);  	

		
		var tmp=tRow.insertCell(0);
		tmp.innerHTML ='<input type="text" name="part[]" value="" size="15" maxlength="30">';
		tmp.align='center';
		tmp=tRow.insertCell(1);
		tmp.innerHTML ='<input type="text" name="hakyear[]" value="" size="5" maxlength="1">';
		tmp.align='center';
		tmp=tRow.insertCell(2);
		tmp.innerHTML ='<input type="text" name="hakbun[]" value="" size="10" maxlength="10">';
		tmp.align='center';
		tmp=tRow.insertCell(3);
		tmp.innerHTML ='<input type="text" name="name[]" value="" size="10" maxlength="30">';
		tmp.align='center';
		tmp=tRow.insertCell(4);
		tmp.innerHTML ='<input type="text" name="tel[]" value="" size="10" maxlength="30">';
		tmp.align='center';
		tmp=tRow.insertCell(5);
		tmp.innerHTML ='<input type="button" value="삭제" class="btn_all_sellect" onClick="fnc_table_delete(event)">';
		tmp.align='center';
}
-->
</script>


<table border=1 width="700"  id="tb1_task">
<tr>
	<th>학부(과, 전공)</th>
	<th>학년</th>
	<th>학번</th>
	<th>성명</th>
	<th>연락처</th>
	<th>추가</th>
</tr>
<tr>
<td><input type="text" name="mem_school[]" value="" class='Wid60 mWid10' size="15" maxlength="30"></td>
<td><input type="text" name="mem_class[]" value="" class='Wid60 mWid10' size="5" maxlength="1"  style="ime-mode:disabled"></td>
<td><input type="text" name="memb_no[]" value="" class='Wid60 mWid10' size="10" maxlength="10"  style="ime-mode:disabled"></td>
<td><input type="text" name="mem_name[]" value="" class='Wid60 mWid10' size="10" maxlength="30"></td>
<td><input type="text" name="mem_tel[]" value="" class='Wid60 mWid10' size="10" maxlength="30"></td>
<td>
	<input type="button" value="추가" class="btn_all_sellect" onClick="fnc_table_insert()"></td>
</tr>
</table>