how to call java script external

[fareedreg]

{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fcharset0 Arial;}}

{\*\generator Msftedit 5.41.15.1507;}\viewkind4\uc1\pard\f0\fs20 function validateDate(fld) \{\par

    var RegExPattern = /^((((0?[1-9]|[12]\\d|3[01])[\\.\\-\\/](0?[13578]|1[02])[\\.\\-\\/]((1[6-9]|[2-9]\\d)?\\d\{2\}))|((0?[1-9]|[12]\\d|30)[\\.\\-\\/](0?[13456789]|1[012])[\\.\\-\\/]((1[6-9]|[2-9]\\d)?\\d\{2\}))|((0?[1-9]|1\\d|2[0-8])[\\.\\-\\/]0?2[\\.\\-\\/]((1[6-9]|[2-9]\\d)?\\d\{2\}))|(29[\\.\\-\\/]0?2[\\.\\-\\/]((1[6-9]|[2-9]\\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00)))|(((0[1-9]|[12]\\d|3[01])(0[13578]|1[02])((1[6-9]|[2-9]\\d)?\\d\{2\}))|((0[1-9]|[12]\\d|30)(0[13456789]|1[012])((1[6-9]|[2-9]\\d)?\\d\{2\}))|((0[1-9]|1\\d|2[0-8])02((1[6-9]|[2-9]\\d)?\\d\{2\}))|(2902((1[6-9]|[2-9]\\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00))))$/;\par

    var errorMessage = 'Please enter valid date as month, day, and four digit year.\\nYou may use a slash, hyphen or period to separate the values.\\nThe date must be a real date. 30/2/2000 would not be accepted.\\nFormay dd/mm/yyyy.';\par

    if ((fld.value.match(RegExPattern)) && (fld.value!='')) \{\par

        alert('Date is OK'); \par

    \} else \{\par

        alert(errorMessage);\par

        fld.focus();\par

    \} \par

\}\par

\par

}

 

 

This is my java script for validation of date dd/mm/yyyy

 

 

 

 

 

i m calling it from my html form like this

 

<td><input name="txtissue" type="text" id="txtissue" size="10" maxlength="10"/>   

 

<script language="JavaScript" type="text/javascript"> 

 

validateDate("txtissue");

 

</script>

 

</body>

 

</html>

 

 

 

showing unexpected error why