JS截取字符串常用方法

 str=”jpg|bmp|gif|ico|png”;
 arr=theString.split(”|”);
 //arr是一个包含字符值”jpg”、”bmp”、”gif”、”ico”和”png”的数组

var delimitedString=myArray.join(delimiter);
 var myList=new Array(”jpg”,”bmp”,”gif”,”ico”,”png”);
 var portableList=myList.join(”|”);
 //结果是jpg|bmp|gif|ico|png

var myString=”JavaScript”;
 var w=myString.indexOf(”v”);w will be 2
 var x=myString.indexOf(”S”);x will be 4
 var y=myString.indexOf(”Script”);y will also be 4
 
 var z=myString.indexOf(”key”);z will be -1