ช่วยด้วยค่ะ code php มี 2 คำถามนะค่ะคื่อตัวเลขมี comma กับจุดทศนิยม

<script>
function cal(res){

	document.getElementById('total').value=parseFloat(res.value)*3;
}
</script>
res:<input type="text" id="resvalue"  onblur="cal(this)" /><br/>
total:<input type="text" id="total"/>

<script>
function cal(res){
	if(res.value==""){
		alert("กรุณาใส่ค่าด้วยค่ะ");
		document.getElementById('total').value="";
		res.value="";	
		res.focus();  // not support firefox
		//setTimeout(function(){res.focus()}, 10); // warning! maybe bug		
		return;
	}
	if(/^(\d+)?(\.\d+)?$/.test(res.value) ){
		document.getElementById('total').value=parseFloat(res.value)*3;
	}else{
		alert("รูปแบบผิดค่ะ");
		document.getElementById('total').value="";
		res.value="";	
		res.focus();  // not support firefox
		//setTimeout(function(){res.focus()}, 10); // warning! maybe bug		
	}
}
</script>

res:<input type="text" id="resvalue" onblur="cal(this)" /><br/>
total:<input type="text" id="total" />

<script>
function cal(res){
	var  resvalue =res.value.replace(/\,/,"");
	if(resvalue==""){
		alert("กรุณาใส่ค่าด้วยค่ะ");
		document.getElementById('total').value="";
		res.value="";	
		res.focus();  // not support firefox
		return;
	}
	if(/^(\d+)?(\.\d+)?$/.test(resvalue) ){
		document.getElementById('total').value=parseFloat(resvalue)*3;
	}else{
		alert("รูปแบบผิดค่ะ");
		document.getElementById('total').value="";
		res.value="";	
		res.focus();  // not support firefox
	}
}
</script>

res:<input type="text" id="resvalue" onblur="cal(this)" /><br/>
total:<input type="text" id="total" />