2020-02-16 标签:js,表单,验证,方法,实用,下面,的是,长度,function,textid,var,len,checkfield,document,inputstring,value,string

//下面验证的是长度 function checkTextLen(textId){ var len = 0; var checkField=document.getElementById(textId); var inputstring = checkField.value; var string_