WMLScript isValid() º¯Êý

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n = URL.isValid(url)
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n ´Óº¯Êý·µ»ØµÄ²¼¶ûÖµ¡£
url Ò»¸ö×Ö·û´®¡£

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var a = URL.isValid("http://www.w3school.com.cn");
var b = URL.isValid("http//www.w3school.com.cn");
var c = URL.isValid("http://www.w3school.com.cn!!!!");

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a = "true"
b = "false"
c = "false"
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