Seleção Radio

HTML

<style>

.right {
    position: absolute;
    right: 50px;
    width: 350px;
    padding: 30px;
}
.right2 {
    padding-left: 500px;
}

 .left {
    padding-left: 125px;
	margin: 0px;
}

.row {  
	display: flex;
	flex-direction: column;	
	align-items: stretch;  
	justify-content: center;  
	
}

.line {  
	display: flex;  
	flex-direction: row;
	align-items: center;  
	justify-content: space-around;  
}

.size{
	
	max-width: 200px!important;
	
}


</style>
  </head>

  <body >
  



<!-- Declaração de variaveis-->


<!-- Declaração do tamanho do pixel -->
		
		
?>
<img alt="d" class="right" src="img/fundo.png"  />
<br><br><br><br><br><br><br><br>


<div class="line">
<header class="header no-print">
		<div class="row">
			<form class="form-horizontal" method="POST">
				<fieldset>
					<!-- Text input-->
					<div class="form-group">
						<label class="col-md-5 control-label" for="Fabric">Fabric Wide</label>  
						<div class="col-md-6">
							<input id="Fabric" name="Fabric" type="text" placeholder="mm" class="form-control input-md">
						</div>
					</div>

					<!-- Text input-->
					<div class="form-group">
						<label class="col-md-5 control-label" for="Spare">Spare width</label>  
						<div class="col-md-6">
							<input id="Spare" name="Spare" type="text" placeholder="mm" class="form-control input-md">
						</div>
					</div>

					<!-- Text input-->
					<div class="form-group">
						<label class="col-md-5 control-label" for="Xres">Resolution X</label>  
						<div class="col-md-6">
							<input id="Xres" name="Xres" type="text" placeholder="mm/pixel" class="form-control input-md">
						</div>
					</div>

					<!-- Text input-->
					<div class="form-group">
						<label class="col-md-5 control-label" for="Yres">Resolution Y</label>  
						<div class="col-md-6">
							<input id="Yres" name="Yres" type="text" placeholder="mm/pixel" class="form-control input-md">
						</div>
					</div>

					<!-- Text input-->
					<div...

JavaScript

$(function() {
    $('.rdo').on('click', function() {
       $('#saida').val( $(this).val() );
    });
});