javascript:巧用eval函数组装表单输入项为json对象

var myObj = {};  

myObj.x = document.getElementById("x").value;  

myObj.y = document.getElementById("y").value; 
 
//...  

//然后ajax post或get提交

 eval('A={}');
 if (A.b==undefined)
 {
  A.b = {};
 }
 eval('A.b.c = 1');
 alert(A.b.c);

运单号：<input type="text" name="AwbPre" value="112" style="width:40px"/>-<input type="text" name="AwbNo"  value="12312311"/><br/>
结算方式：
<select name="SettlementMode" style="width:100px">
	<option value="CASH" selected="selected">现金</option>
	<option value="MONTH">月结</option>
</select>
<br/>
不需要赋值的属性：<input type="input" name="NotMe" value="NotMe ..." isModel="false"/>


<script type="text/javascript">


	function setFormModel(modelName){
		eval(modelName + "={}");
		var inputArr = document.getElementsByTagName("INPUT");
		for(var i=0;i<inputArr.length;i++){
			var isModel = inputArr[i].getAttribute("isModel");
			var itemName = inputArr[i].name;
			var itemValue = inputArr[i].value;			
			if(isModel!="false"){
				eval(modelName + "." + itemName + "='" + itemValue + "';");
			}			
		}

		var selectArr = document.getElementsByTagName("SELECT");
		for(var i=0;i<selectArr.length;i++){
			var isModel = selectArr[i].getAttribute("isModel");
			var itemName = selectArr[i].name;
			var itemValue = selectArr[i].value;			
			if(isModel!="false"){
				eval(modelName + "." + itemName + "='" + itemValue + "';");
			}			
		}
		return modelName;		
	}

	setFormModel("AwbModel");

	alert("单号：" + AwbModel.AwbPre + "-" + AwbModel.AwbNo + "\n结算方式：" + AwbModel.SettlementMode + "\n不该有的属性：" + AwbModel.NotMe);

</script>