<SCRIPT LANGUAGE="JavaScript">
function checkFrm(frm){
if(frm.abc.checked==false){
alert("Please select an item,请你选择");
return false;
}
return true;
}
</SCRIPT>
<form onsubmit="return checkFrm(this)">
<input type="checkbox" name="abc">Window 98
<input type="submit">
</form>
function checkFrm(frm){
if(frm.abc.checked==false){
alert("Please select an item,请你选择");
return false;
}
return true;
}
</SCRIPT>
<form onsubmit="return checkFrm(this)">
<input type="checkbox" name="abc">Window 98
<input type="submit">
</form>
function checkFrm(frm){
if(!(frm.w98.checked || frm.wnt.checked ||frm.wxp.checked)){
alert("请选择一项");
return false;
}
return true;
}
</SCRIPT>
<form onsubmit="return checkFrm(this)">
<input type="checkbox" name="w98">Window 98
<input type="checkbox" name="wnt">Window NT
<input type="checkbox" name="wxp">Window XP
<input type="submit" value="提交">
</form>
<!--
function formSubmit(obj){
var chks=obj;
var checkItems=0;
var interestStr=""; for(var len=0; len<chks.length; len++)
if(chks[len].checked){
checkItems++;
interestStr+="\n"+chks[len].value;
} if(checkItems==0){
alert("请至少选择一样兴趣!");
return false;
} return confirm("你的兴趣是:\n"+interestStr+"\n\n确定发送你的资料吗?");
}
//--></SCRIPT><FORM NAME=formA method=get>
<INPUT TYPE="checkbox" NAME="interest" VALUE="爬山">爬山
<INPUT TYPE="checkbox" NAME="interest" VALUE="看电影">看电影
<INPUT TYPE="checkbox" NAME="interest" VALUE="打球">打球<BR>
<INPUT TYPE="submit" VALUE=确定 onclick=formSubmit(document.formA.elements)>
</FORM>