jQuery if语句中来自php echo的数据

Question

function(data, textStatus, jqXHR) {
    $("#info").html(data);
    if ((data).substr(0, 5)=="Please") {$("#imgOk").fadeIn();} // doesn't work

data is is php echo from another page. It is successfully placed into div #info and it's content is:
Please, check your Inbox .

Answer 1

Assuming data is fine, substr 's second parameter is the amount of characters to retrieve, not the ending index. As "Please" is 6 letters, it should be .substr(0, 6) .

See http://www.w3schools.com/jsref/jsref_substr.asp for more info.