Tip tip is too long

function show(obj){
if($(obj).text()!=null&&$(obj).text().length>15){
layer.tips("<span style='color:black'>"+$(obj).text()+"</span>",
obj,
{
tips:[3,'#fff']/* ,area: 'auto' */,
maxWidth:550,
maxHeight:450});
/* layer.tips($(obj).text(), $(obj), {
area: 'auto',//换行 或者['宽px','高px'] 或者['auto','auto']
tips:$(obj).text(),
time: 3
}); */}
}