这个javascript不错

<!–
function MM_jumpMenu(targ,selObj,restore){ //v3.0

if (selObj.options[selObj.sel&#101;ctedIndex].value!=””){

eval(targ+”.location='”+selObj.options[selObj.sel&#101;ctedIndex].value+”‘”);
if (restore) selObj.sel&#101;ctedIndex=0;

//height
document.all[‘server’].style.height=server.document.body.scrollHeight
}
}
//–>
function ckjia()
{
var maxnum=parseInt(document.form8.hmax.value);
var formnum=parseInt(document.form8.Num.value);
var minnum=parseInt(document.form8.p_min.value);
if (formnum>maxnum){
msg.innerHTML=formnum+”error”+maxnum;
}
else if (document.form8.Num.value==””){
msg.innerHTML=”error! “;
}
else if (formnum<minnum){
msg.innerHTML=”error!”;
}
else if ((maxnum>=formnum)&amp;(formnum>=minnum)){
msg.innerHTML=”ok !”;
}
document.form8.price1.value=document.form8.price.value*document.form8.Num.value;
}