js判断字符串中是否存在某些字符的方法

var patt = new RegExp('Adam');//要查找的字符串为'Adam'
var str = 'My name is Adam Li.';

if(patt.test(str)){//字符串存在返回true否则返回false
 document.write('字符串中有Adam'); 
}else{
 document.write('字符串中没有Adam'); 
}

                                                                                                                              李汉团   Mar 2,2012