javascript

1. getElementById Method

var productElement = document.getElementById("product");

if (productElement != null) {
alert(productElement.innerHTML);
}
else {
alert("its null");
}

2. JavaScript Try...Catch Statement

function message()
{
try
{
adddlert("Welcome guest!");
}
catch(err)
{
txt="There was an error on this page.\n\n";
txt+="Error description: " + err.description + "\n\n";
txt+="Click OK to continue.\n\n";
alert(txt);
}
}


3.Link to JS File