javascript exception catching and error printing

I hate seeing JavaScript errors on pages, especially on my pages, so in this case I have to run JavaScript debugger to catch the exact line there the problem is. If I change a function with many exceptions, a better solution exists: printing JavaScript errors with alert function (we firstly handle the error and then we print it):

try{
    ... do some javascript here ...
} catch (e) {
   try{
     var ex_joro = e; // this is to remember to set the exception name :)
     var errorString = 
        ex_joro.name + ' ' + ex_joro.message 
        + ', fileName = ' +  ex_joro.fileName
        + ', lineNumber = ' +  ex_joro.lineNumber
        +  ", stack: " + ex_joro.stack
        +  ",\n\n all: " + ex_joro
        ; // this is used when you do javascript debugging

     alert( errorString );
   } catch ( exception_666 ){
     alert( "exception while trying to alert exception " + exception_666 );
   }
}