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function quxiantu(plateNum){
	//创建一个表单元素
	var myform = document.createElement("form");
	//创建一个input元素
	var plateNumElement 	= document.createElement("input");
	plateNumElement.type 	= "hidden";		
	plateNumElement.value	= plateNum;
	plateNumElement.name 	= "plateNum";
			
	myform.action = "${path}/mileageStat_quxiantu.action";
	myform.method="post";   
	window.open ("", "win", "width=600, height=400, top=100, left=300, toolbar=no, menubar=no, scrollbars=yes, resizable=no,location=no, status=no");
	myform.target = "win";			
	//把创建的myform放到body里
	document.body.appendChild(myform);			
	//把创建的元素放到myform里
	myform.appendChild(plateNumElement);
	//表单提交
	myform.submit();
}

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<input type="submit" value="查看" onclick="quxiantu('${vehicle.plateNum}')">

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