Can you write you own functions in Dreamweaver if you have used the insert? Code Below is not working, is it becasue of Dreamweaver's insert behaviors?

function check_it()
{
var complete=true;
var casename=document.frmCaseNew.txtCasename.value;
If ((casename=="" )|| (casename==null))
{
alert("Case Name is Required";
complete=false;
}
return complete;
}