对输入框进行检测，通过就会在前面打勾表示通过-脚本技巧特效
<!--把如下代码加入<body>区域中-->
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
FormName = "form" //Name of the form
CheckName = "check" //Name of the checkboxes (without
1,2,3...10,11,12...)
TextName = "text" //Name of the textfields (without
1,2,3...10,11,12...)
var Condition=new Array(
'a!=""', //Must be filled
'a!=""', //Must be filled
'a!=""&&a.length>5&&a.indexOf("@")!=-1&&a.indexOf(".")!=-1', //Must
be longer than 5 characters, have @, and atleast one '.'
'a.length>7&&!(a.split("/")[0]*1>12)&&!(a.split("/")[1]*1>31)&&!
(a.split("/")[2]*1<1900)' //Must be longer than 7 characters, first
(two) digit(s) NOT greater than 12, second (two) digit(s) NOT
greater than 31 and last 4 greater than 1900
);
function docheck(w) {
eval("a=document." + FormName + "." + TextName + w + ".value");
if (eval(Condition[w])) eval("document." + FormName + "." +
CheckName + w + ".checked=true");
else eval("document." + FormName + "." + CheckName + w +
".checked=false");
}
// End -->
</script>
<form name=form>
<input type=checkbox name=check0 onClick="return false"> First:
<input type=text name=text0 onBlur='docheck("0")'><BR>
<input type=checkbox name=check1 onClick="return false"> Last:
<input type=text name=text1 onBlur='docheck("1")'><BR>
<input type=checkbox name=check2 onClick="return false"> E-Mail:
<input type=text name=text2 onBlur='docheck("2")'><BR>
<input type=checkbox name=check3 onClick="return false"> Birthday
(mm/dd/yyyy): <input type=text name=text3 onBlur='docheck
("3")'><BR>
</form>
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乐其
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