search()

作用: 检索与正则表达式相匹配的值

语法:

字符串.search(正则表达式)//匹配失败返回-1

实例：

var re = /apples/gi; 
var str = "Apples are round, and apples are juicy.";
if (str.search(re) == -1 ) { 
 console.log("Does not contain Apples" ); 
} else { 
 console.log("Contains Apples" ); 
}