JavaScript 设置和获得Radio的选中值

设置单选框默认值

function setCheckedValue(radioName, newValue) {
	if(!radioName) return;
	   var radios = document.getElementsByName(radioName);   
	   for(var i=0; i<radios.length; i++) {
	      radios[i].checked = false;
	      if(radios[i].value == newValue.toString()) {
	      radios[i].checked = true;
	   }
        }
}

获得单选框选中值

function getRadioValue(radioName){//得到radio的值   
        var obj=document.getElementsByName(radioName);   
        for(var i=0;i<obj.length;i++){   
        if(obj[i].checked){   
            alert(obj[i].value);
            return obj[i].value;   
            }   
        }   
    }