var i;
var b_click = false;
var b_chk_sub = false;

function SelectAll(chk,selectall)
{
	
	
	if(b_click == false)
	{
		if(chk.length == null)
		{
			chk.checked = true;
			//return true;
		}
		else
		{
			for(i=0;i<chk.length;i++)
			{
				chk[i].checked = true;
			}
		}
		b_click = true;
	}
	else if(b_click == true)
	{
		if(chk.length == null)
		{
			chk.checked = false;
			//return true;
		}
		for(i=0;i<chk.length;i++)
		{
			chk[i].checked = false;
		}
		selectall.checked = false;
		b_click = false;
	}
}
function CheckNum(value)
{
	if(isNaN(value.value))
	{
		alert("กรุณากรอกข้อมูลเป็นตัวเลขเท่านั้น");
		value.value="";
		value.focus();
	}
}
function checksub(obj_input)
{
	if(b_chk_sub == false)
	{
		obj_input.disabled = false;
		obj_input.className = 'color_white';
		b_chk_sub = true;
	}
	else
	{
		obj_input.disabled = true;
		obj_input.className = 'color_textbox';
		b_chk_sub = false;
	}
}