本文实例讲述了JavaScript检查子字符串是否在字符串中的方法。分享给大家供大家参考，具体如下：

var strnew="Hello Raghu How are u" //Checking existence in entire string if(strnew.indexOf("Raghu") != -1 ) { alert("Exists"); } /* Checking existence at the end of string For example, variable result1 in the following example is assigned the value of true because the word "Ishmael" appears at the end of the string. Variable result2 is assigned a value of false because "Raghu" doesn't appear at the end of the string. */ result1 = /Raghu$/.test("Call me Raghu"); result2 = /Raghu$/.test("Call me Raghu. Some years ago"); /* Checking existence in the begining of string In the following example, variable result1 is assigned the value of true because the word "Birds" appears at the beginning of the string. Variable result2 is assigned the value of false because "Birds" doesn't appear at the beginning of the string. */ result1 = /^Birds/.test("Birds fly"); result2 = /^Birds/.test("Big Birds fly");

更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript查找算法技巧总结》及《JavaScript数据结构与算法技巧总结》

希望本文所述对大家JavaScript程序设计有所帮助。