.column_1, .column_2, .column_3{
z-index:1;
}


.column_1
{
	float:left;
	width:420px;
	margin-right:10px;
}

.column_2
{
	float:left;
	margin-right:10px;
	width:330px;
}

.column_3
{
	float:left;
	width:180px;
}