OnBlur Not Working

I have an JS function called from one of my JSP on Blur on a text box. But the JS function is not being called. I am pasting the code below.

<td width="14%">Date of Losses: </td>
<td width="14%">
<input type="text" maxlength = 2 size=2 name="txtLossdd" value="<%=strLossdd%>" checkDay(this)">-
<input type="text" maxlength = 2 size=2 name="txtLossmm" value="<%=strLossmm%>" checkMonth(this)">-
<input type="text" maxlength = 4 size=4 name="txtLossyyyy" value="<%=strLossyyyy%>" checkLossDate()">
</TD>

The JS function

function checkLossDate()
{
alert("Test");
var lossDD=document.frmSicsClmHdrSetup.txtLossddFrom.value;


The first three lines of the function.The first alert not being called. I have used the same logic in one of my other JSP's.There it worked fine. I know i am missing some silly things.