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<script>
function fun(){
var len = document.form1.rad.length ;
var flag = 0;
for(i=0;i <len;i++)
{
if(document.form1.rad[i].checked){
flag++;
}
}
if(flag>0){
document.form1.action="edit.jsp";
document.form1.submit();
}else{
alert("请选择修改");
}
}
</script>
<form name="form1">
<input name="rad" type="radio">
<input name="rad" type="radio">
<input name="rad" type="radio">
<input name="rad" type="radio">
<input type="submit" value="修改" onclick="return fun();">
</form>
<script>
function fun(){
document.form1.action="edit.jsp";
for(var i=0; i<document.form1.rad.length; i++){
if(document.form1.rad[i].checked)return true;
}
return !!alert("请选择修改");
}
</script>
<script type="text/jscript">
function readySubmit(){
var radios=document.getElementsByName("rdo");
for(var iLen=radios.length,i=0;i<iLen;i++){
if(radios[i].checked) return true;
}
alert("您当前没有做出选择");
return false;
}
</script>
<form action="redirect_page.htm">
<input type="radio" name="rdo">a
<input type="radio" name="rdo">b
<input type="radio" name="rdo">c
<input type="radio" name="rdo">d
<input type="radio" name="rdo">e
<input type="radio" name="rdo">f
<input type="radio" name="rdo">g
<input type="radio" name="rdo">h
<input type="radio" name="rdo">i
<input type="radio" name="rdo">j
<input type="submit" value="提 交" onclick="return readySubmit();">
</form>