JavaScript Replace function check

JavaScript Replace function check

I am doing a java script replace as :
var featureTitle;
featureTitle = row.cells[1].text();
if (!featureTitle.indexOf('*') != -1)
{
featureTitle = featureTitle.replace('*', '');
}
Is if (!featureTitle.indexOf('*') != -1) needed check here??
OR replace will take care of it?