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;   

            }   

        }   

    }