JS 验证正规表达式

function changeInsSort() {  
		var policyCode = document.getElementById("inOutAccount.operNumber").value;
		//alert("policyCode="+policyCode);
		var carRegEx   = /^\w{11}(19|20)\d{2}B\d{6}$/;
		var unCarRegEx = /^\w{8}(19|20)\d{2}\d{8}$/;
		if (carRegEx.test(policyCode)) {
			//alert("车险保单");
		    unCarInsTr.style.display="none";
			carInsTr.style.display="";  
		}else if (unCarRegEx.test(policyCode)) {
			//alert("非车险保单");
			carInsTr.style.display="none";
			unCarInsTr.style.display="";
		}
			
	}

注意正规表达式不能用引号引起来,而是用"/^"+正规表达式+"$/"