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dhtmlxGrid exception about destructor

Dear,

I use dhtmlxGrid V1.5 pro in IE7. My sample code is:

var grid = new dhtmlXGridObject("gridDiv");
grid.setImagePath("../dhtmlxgrid/imgs/");
grid.setSkin("light");
grid.setDateFormat("%Y.%m.%d");
grid.enableColumnAutoSize(true);
grid.enableColSpan(true);
grid.enableRowspan(true);
grid.enableColumnMove(true);
grid.enableMultiselect(true);

//Do load data in grid and do some my own processing.

grid.destructor();
$("gridDiv").innerHTML="";

but here comes the problem. an exception is throwned out in dhtmlxgrid.js at the line in init():

if (_isIE) window.setTimeout(function(){ self.setSizes(); },1);

where I observed that self.setSizes=null.

Would you like to give me some advice to fix the problem?

Best Regards,

Ren Hongmin

>>Would you like to give me some advice to fix the problem?
The problem may occur only if you are destructing grid exactly after initializing it - which is quite strange use-case.
If you not need to support IE 5.5 you can safely comment problematic string ( it is not necessary for later versions of IE )