js中清除字符串中某个字符串

#create ydds
#date 2009-09-20
//remove src target
function removestrwithcomma(srcstr, targetstr){
    var returnstr = '';
    if (srcstr == null || srcstr == '' || srcstr == undefined) {
        return returnstr;
    }
    else
        if (srcstr.indexof(targetstr) == -1) {
            return srcstr;
        }
        else {
            var srcstrs = srcstr.split(',');
            if (srcstrs.length == 1) {
                returnstr = '';
            }
            else
                if (srcstr.match(eval("/^" + targetstr + ".*/")) != null) {
                    returnstr = srcstr.replace(targetstr + ',', '');
                }
                else
                    if (srcstr.match(eval("/.*" + targetstr + "$/")) != null) {
                        returnstr = srcstr.replace(',' + targetstr, '');
                    }
                    else {
                        returnstr = srcstr.replace(',' + targetstr, '');
                    }
            return returnstr;
        }
}
var xmlhttplink;
function createxmllinkhttprequest(){
    if (window.activexobject) {
        xmlhttplink = new activexobject("microsoft.xmlhttp");
    }
    else
        if (window.xmlhttprequest) {
            xmlhttplink = new xmlhttprequest();
        }
}
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