js string

http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_split4

 <p id="demo">Click the button to display the array values after the split.</p>
 <button onclick="myFunction()">Try it</button>

     
function myFunction()
{
var str = "http://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png";
var res = str.substring(49).split("-71",1); //generic_business

document.getElementById("demo").innerHTML=res;
}

google maps icon https://github.com/bmorgan21/stash/blob/master/lib/icons.coffee

javascript只取數字 用正規表示

   
var str=$(".area_product").css('left');//出來會是312px
var reg=/[^\d]+/img;
str=str.replace(reg,"");
alert(str);//出來會是312