var InterestKeywordListString = $("#userInterestKeywordLabel").html(); 

var InterestKeywordListArr = []; 
var t = '';

for (var i = 0; i < InterestKeywordListString.length; i++) { 
var tmp = InterestKeywordListString.charAt(i); 
if (tmp != '' && tmp != ',') { 
t += tmp; 
lastNum = true; 
} else { 
if (t != '' && t != ',') { 
InterestKeywordListArr.push(t); 
t = ''; 
} //脚本学堂 http://www.jbxue.com
lastNum = false; 
} 
} 
if (t != '' && t != ',') { 
InterestKeywordListArr.push(t); 
}

for(var i=0;i<InterestKeywordListArr.length;i++){ 
alert( 
InterestKeywordListArr[i] 
); 
}