Pass String to JavaScript

In order to pass a string value as parameter to a javascript function using htp.p. I used the below mechanism by enclosing it in 2 single quotes.

         htp.p('<td colspan="1" style="text-align:left"> <input type="text" id="processing_spatial_number_of_changes'||i||'" name="process_sp_number_of_changes" size="5" ' ||

     lv_sp_classname ||' value="" onblur="checkisnumtext(this,''# of Changes in Processing Section'');"  ></td>');

function checkisnumtext(field,text1)

{

  var s_token_num=field.value;

  var isnum = /^\d+$/.test(s_token_num);

     if (! isnum) {

        alert(text1 + " should contain only numeric digits");

        return false;

     }

     else{

      //alert(text1 + " contains only numeric digits");

      return true;

    }  

}

//end function checkisnumtext