try it, then you know it____________just do it , as love easily fade.

摘要： 1. put space on the two sides of %, not mandatory,//can be ignored.2.But we use === (three equal signs) to check if one variable's value is "equal" or "identical" to another variable's value.as == can have some odd behavior in javescript.3. backup some command used herepr 阅读全文