javascript function to check "|" symbol is present or not

Try to implement like this

var str="Plcc-failed|Score-passed|bankruptcy-passed|Years in Business";
var n=str.split("|");
var disp;

alert(pipeindex);
for(var i=0;i<4;i++)
{
if(i==0)
disp=n[i];
else
disp=disp+n[i];

alert(disp);