JS自定义去除字符串左右两边的指定字符

function ltrim(str,char){
var pos = str.indexOf(char);
var sonstr = str.substr(pos+1);
return sonstr;
}

function rtrim(str,char){
var pos = str.lastIndexOf(char);

var sonstr = str.substr(0,pos);

return sonstr;
}

原文：http://www.cnblogs.com/toward-the-sun/p/4155087.html