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price types Currency Symbol from $ to €( EURO)

How do I change the price types Currency Symbol from $ to € (EURO) without modifying the api code?

>>without modifying the api code?
This line hardcoded so it much more easy to change a single character in original code, but can be done by script as well

eXcell_price.prototype.setValue = function(val){
        if(isNaN(Number(val))){
            val = 0;
        var color = "green";
        if(val<0) color = "red";
        this.setCValue("<span>ˆ</span><span style='padding-right:2px;color:"+color+";'>"+val+"</span>",val);
    }

I prefer to work in my jsp code, so on next upgrade I will have no problems...
This is my code, how I could put the code in here?

mygrid.setColTypes(   "ro,ro,ro,ro,ro,ro,ro,ro,price,price,ro,ro,ro");
mygrid.init();
mygrid.loadXML(loadDataURL);
  
 

You can place code anywhere before data loading, in case of above code -  anywhere before calling
    mygrid.loadXML(...

I've tries the following code but it does not work, probably i'm missing something.........

mygrid.setColTypes(   "ro,ro,ro,ro,ro,ro,ro,ro,price,price,ro,ro,ro");
 
mygrid.setValue = function(val){
                                                        if(isNaN(Number(val))){
                                                                                  val = 0;
                                                                                  var color = "green";
                                                                                  if (val<0) color = "red";
                                                                                      this.setCValue("<span>e</span><span style='padding-right:2px;color:"+color+";'>"+val+"</span>",val);
                                                                                }
                                                       }


mygrid.init();
mygrid.loadXML(loadDataURL);
    
 

The correct code is a
    eXcell_price.prototype.setValue =
not the
    mygrid.setValue =

eXcell_price is a global object, which defines rules for price excell.

Without the code you give me, I see $ and numbers , whit the code it appears blank, no sign no numbers...  what I'm wrong?

 mygrid.setColTypes(    "ro,ro,ro,ro,ro,ro,ro,ro,ro,price,price,ro,ro");
   mygrid.setInitWidths("0,50,75,70,50,150,150,150,150,60,60,150,60");
   mygrid.setColAlign(   "center,center,center,center,center,center,center,center,center,center,center,center,center");
   mygrid.setColumnColor("#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff,#ffffff");
   mygrid.setSkin("modern");
   mygrid.enableMultiselect(true);
   mygrid.setOnRowDblClickedHandler(doOnRowDblClicked);  

eXcell_price.prototype.setValue = function(val){
       if(isNaN(Number(val))){
            val = 0;
        var color = "green";
        if(val<0) color = "red";
        this.setCValue("<span>$</span><span style='padding-right:2px;color:"+color+";'>"+val+"</span>",val);
    }
    };


mygrid.init();
   
   mygrid.enableAlterCss("even","uneven");
   mygrid.setSkin("modern");
 
   mygrid.setPagingWTMode(true,true,true,false,["Risultati","Records da "," a ","Pag. "," Righe per pag."]);
   mygrid.enablePagingWT(true,12,0,"recinfoArea");
  
   mygrid.loadXML(loadDataURL);
 

Please check attached sample.