下面错在什么地方，不可行<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script src="jquery-1.7.2.min.js" type="text/javascript"></script><style>.mgs{ color:#F00; display:none;}</style></head><body><form action="http://www.99m.com" onSubmit="return nameddd;"> <P class="p1"><input id="name" type="text" value="" onblur="indexname();" /><span class="mgs">用户名不能为空</span></P> <input type="submit" value="Submit" /></form><script>var nameddd = false;function indexname(){ var name = $('#name'); var namevalue = $('#name').val(); var g = /^.{3,8}$/; if(namevalue == ''){ $('.mgs').show().html('用户名不能为空'); var nameddd = false; }else if( !g.test(namevalue) ){ $('.mgs').show().html('用户名3位到8位'); var nameddd = false; }else{ $('.mgs').hide(); var nameddd = true; }}</script></body></html>
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