<script type="text/javascript">
function check_box(){
var count=document.SearchLineFrm.jingdian.length;
var j=0;
for(var i=0;i<count;i++){
if (document.SearchLineFrm.jingdian[i].checked)
++j;
}
if(j==0){
alert("请至少选择一个景点!");
return false;
}
else{return true;
}
}
</script>